Hello,
I have been working with cplex on python for a few months now. 
I made my model with docplex but then I used a solution pool with cplex for solving it (I don't use docplex to solve it). In my model ,with the help of some other developers, I found out when my model is being built with docplex some of the docplex specific constraints( for example: if_then and logical_and) are not being implemented in the model. Therefor, when I solve the model with cplex I don't have some of the constraints implemented in my solutions.
What can I do to make cplex wrap up my whole model before I send it to my solution pool?

------------------------------
Sana NZ
------------------------------

#DecisionOptimization

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne
------------------------------

Thanks , I used your code but I got this error:
AttributeError: 'CplexEngine' object has no attribute '_sync_equivalence_cts'

------------------------------
sana naz
------------------------------

Original Message:
Sent: Mon September 28, 2020 10:07 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne
------------------------------

Which version of DOcplex are you using? is it the latest version (2.15.194 of last July), if not can you update?

------------------------------
Philippe Couronne
------------------------------

Original Message:
Sent: Tue September 29, 2020 10:57 AM
From: sana naz
Subject: Model problems with docplex and cplex on python

Thanks , I used your code but I got this error:
AttributeError: 'CplexEngine' object has no attribute '_sync_equivalence_cts'

------------------------------
sana naz
------------------------------


Original Message:
Sent: Mon September 28, 2020 10:07 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne

I have version 2.0 but I did not install it directly. I installed cplex studio with the academic licence. I don't know how can i upgrade that since there is no new version of cplex studio (latest I have is 12.10) and my system doesn't recognize docplex by itself in order to upgrade. 
Is it OK if I install docplex again with conda and upgrade?

------------------------------
sana naz
------------------------------

Original Message:
Sent: Tue September 29, 2020 11:02 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Which version of DOcplex are you using? is it the latest version (2.15.194 of last July), if not can you update?

------------------------------
Philippe Couronne
------------------------------


Original Message:
Sent: Tue September 29, 2020 10:57 AM
From: sana naz
Subject: Model problems with docplex and cplex on python

Thanks , I used your code but I got this error:
AttributeError: 'CplexEngine' object has no attribute '_sync_equivalence_cts'

------------------------------
sana naz


Original Message:
Sent: Mon September 28, 2020 10:07 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne

DOcplex is a pure python module, so it has a faster release cycle than Cplex Studio.
Before going further can you provide the following informations:

- what is your platform? (windows, Linux, MacOs)?
- what is your version of python? (output of `python --version`)
- what is your version of anaconda?
- what version of Cplex Studio are you using?

And finally, what is the output of the `pip freeze` command?\
You should see one line with `docplex=2.xxx` in it.

From there, I can advise a safe course of actions to upgrade DOcplex to the latest version.


     Philippe.

------------------------------
Philippe Couronne
------------------------------

Original Message:
Sent: Tue September 29, 2020 12:00 PM
From: sana naz
Subject: Model problems with docplex and cplex on python

I have version 2.0 but I did not install it directly. I installed cplex studio with the academic licence. I don't know how can i upgrade that since there is no new version of cplex studio (latest I have is 12.10) and my system doesn't recognize docplex by itself in order to upgrade. 
Is it OK if I install docplex again with conda and upgrade?

------------------------------
sana naz
------------------------------


Original Message:
Sent: Tue September 29, 2020 11:02 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Which version of DOcplex are you using? is it the latest version (2.15.194 of last July), if not can you update?

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 10:57 AM
From: sana naz
Subject: Model problems with docplex and cplex on python

Thanks , I used your code but I got this error:
AttributeError: 'CplexEngine' object has no attribute '_sync_equivalence_cts'

------------------------------
sana naz


Original Message:
Sent: Mon September 28, 2020 10:07 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne

- I have windows 10
- python =3.6
- using anaconda3 -anaconda-navigator==1.9.12
-  Cplex Studio version 12.10.0
- docplex==2.11.176

------------------------------
sana naz
------------------------------

Original Message:
Sent: Wed September 30, 2020 05:27 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

DOcplex is a pure python module, so it has a faster release cycle than Cplex Studio.
Before going further can you provide the following informations:

- what is your platform? (windows, Linux, MacOs)?
- what is your version of python? (output of `python --version`)
- what is your version of anaconda?
- what version of Cplex Studio are you using?

And finally, what is the output of the `pip freeze` command?\
You should see one line with `docplex=2.xxx` in it.

From there, I can advise a safe course of actions to upgrade DOcplex to the latest version.


     Philippe.

------------------------------
Philippe Couronne
------------------------------


Original Message:
Sent: Tue September 29, 2020 12:00 PM
From: sana naz
Subject: Model problems with docplex and cplex on python

I have version 2.0 but I did not install it directly. I installed cplex studio with the academic licence. I don't know how can i upgrade that since there is no new version of cplex studio (latest I have is 12.10) and my system doesn't recognize docplex by itself in order to upgrade. 
Is it OK if I install docplex again with conda and upgrade?

------------------------------
sana naz


Original Message:
Sent: Tue September 29, 2020 11:02 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Which version of DOcplex are you using? is it the latest version (2.15.194 of last July), if not can you update?

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 10:57 AM
From: sana naz
Subject: Model problems with docplex and cplex on python

Thanks , I used your code but I got this error:
AttributeError: 'CplexEngine' object has no attribute '_sync_equivalence_cts'

------------------------------
sana naz


Original Message:
Sent: Mon September 28, 2020 10:07 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne

Ok, let's try the following command, from where you ran `pip freeze`:


> pip install --upgrade docplex

This should uninstall the old 2.11 and replace it with 2.15, . You can rerun `pip freeze to check that it worked.
Then the code workaround I sent should work; no surprise it didn't work with 2.11.
Let me know if this works.

   Philippe.

------------------------------
Philippe Couronne
------------------------------

Original Message:
Sent: Wed September 30, 2020 06:24 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

- I have windows 10
- python =3.6
- using anaconda3 -anaconda-navigator==1.9.12
-  Cplex Studio version 12.10.0
- docplex==2.11.176

------------------------------
sana naz
------------------------------


Original Message:
Sent: Wed September 30, 2020 05:27 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

DOcplex is a pure python module, so it has a faster release cycle than Cplex Studio.
Before going further can you provide the following informations:

- what is your platform? (windows, Linux, MacOs)?
- what is your version of python? (output of `python --version`)
- what is your version of anaconda?
- what version of Cplex Studio are you using?

And finally, what is the output of the `pip freeze` command?\
You should see one line with `docplex=2.xxx` in it.

From there, I can advise a safe course of actions to upgrade DOcplex to the latest version.


     Philippe.

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 12:00 PM
From: sana naz
Subject: Model problems with docplex and cplex on python

I have version 2.0 but I did not install it directly. I installed cplex studio with the academic licence. I don't know how can i upgrade that since there is no new version of cplex studio (latest I have is 12.10) and my system doesn't recognize docplex by itself in order to upgrade. 
Is it OK if I install docplex again with conda and upgrade?

------------------------------
sana naz


Original Message:
Sent: Tue September 29, 2020 11:02 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Which version of DOcplex are you using? is it the latest version (2.15.194 of last July), if not can you update?

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 10:57 AM
From: sana naz
Subject: Model problems with docplex and cplex on python

Thanks , I used your code but I got this error:
AttributeError: 'CplexEngine' object has no attribute '_sync_equivalence_cts'

------------------------------
sana naz


Original Message:
Sent: Mon September 28, 2020 10:07 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne

Hi,
I tried your solution on two different machines and got this error:

ERROR: Cannot uninstall 'docplex'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

------------------------------
Sana Nazari
------------------------------

Original Message:
Sent: Wed September 30, 2020 08:28 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Ok, let's try the following command, from where you ran `pip freeze`:


> pip install --upgrade docplex

This should uninstall the old 2.11 and replace it with 2.15, . You can rerun `pip freeze to check that it worked.
Then the code workaround I sent should work; no surprise it didn't work with 2.11.
Let me know if this works.

   Philippe.

------------------------------
Philippe Couronne
------------------------------


Original Message:
Sent: Wed September 30, 2020 06:24 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

- I have windows 10
- python =3.6
- using anaconda3 -anaconda-navigator==1.9.12
-  Cplex Studio version 12.10.0
- docplex==2.11.176

------------------------------
sana naz


Original Message:
Sent: Wed September 30, 2020 05:27 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

DOcplex is a pure python module, so it has a faster release cycle than Cplex Studio.
Before going further can you provide the following informations:

- what is your platform? (windows, Linux, MacOs)?
- what is your version of python? (output of `python --version`)
- what is your version of anaconda?
- what version of Cplex Studio are you using?

And finally, what is the output of the `pip freeze` command?\
You should see one line with `docplex=2.xxx` in it.

From there, I can advise a safe course of actions to upgrade DOcplex to the latest version.


     Philippe.

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 12:00 PM
From: sana naz
Subject: Model problems with docplex and cplex on python

I have version 2.0 but I did not install it directly. I installed cplex studio with the academic licence. I don't know how can i upgrade that since there is no new version of cplex studio (latest I have is 12.10) and my system doesn't recognize docplex by itself in order to upgrade. 
Is it OK if I install docplex again with conda and upgrade?

------------------------------
sana naz


Original Message:
Sent: Tue September 29, 2020 11:02 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Which version of DOcplex are you using? is it the latest version (2.15.194 of last July), if not can you update?

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 10:57 AM
From: sana naz
Subject: Model problems with docplex and cplex on python

Thanks , I used your code but I got this error:
AttributeError: 'CplexEngine' object has no attribute '_sync_equivalence_cts'

------------------------------
sana naz


Original Message:
Sent: Mon September 28, 2020 10:07 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne

Since 2.11 , the way to build distributions of DOcplex has changed. Still, there is a way to force the upgrade, using:

   pip install --upgrade --force-reinstall docplex

The "--force-reinstall" should force Python to upgrade DOcplex, even if the build method has changed. Running `pip freeze` afterwards, you should see 2.15 installed.

           PHilippe.



------------------------------
Philippe Couronne
------------------------------

Original Message:
Sent: Fri October 09, 2020 05:10 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

Hi,
I tried your solution on two different machines and got this error:

ERROR: Cannot uninstall 'docplex'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

------------------------------
Sana Nazari
------------------------------


Original Message:
Sent: Wed September 30, 2020 08:28 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Ok, let's try the following command, from where you ran `pip freeze`:


> pip install --upgrade docplex

This should uninstall the old 2.11 and replace it with 2.15, . You can rerun `pip freeze to check that it worked.
Then the code workaround I sent should work; no surprise it didn't work with 2.11.
Let me know if this works.

   Philippe.

------------------------------
Philippe Couronne


Original Message:
Sent: Wed September 30, 2020 06:24 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

- I have windows 10
- python =3.6
- using anaconda3 -anaconda-navigator==1.9.12
-  Cplex Studio version 12.10.0
- docplex==2.11.176

------------------------------
sana naz


Original Message:
Sent: Wed September 30, 2020 05:27 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

DOcplex is a pure python module, so it has a faster release cycle than Cplex Studio.
Before going further can you provide the following informations:

- what is your platform? (windows, Linux, MacOs)?
- what is your version of python? (output of `python --version`)
- what is your version of anaconda?
- what version of Cplex Studio are you using?

And finally, what is the output of the `pip freeze` command?\
You should see one line with `docplex=2.xxx` in it.

From there, I can advise a safe course of actions to upgrade DOcplex to the latest version.


     Philippe.

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 12:00 PM
From: sana naz
Subject: Model problems with docplex and cplex on python

I have version 2.0 but I did not install it directly. I installed cplex studio with the academic licence. I don't know how can i upgrade that since there is no new version of cplex studio (latest I have is 12.10) and my system doesn't recognize docplex by itself in order to upgrade. 
Is it OK if I install docplex again with conda and upgrade?

------------------------------
sana naz


Original Message:
Sent: Tue September 29, 2020 11:02 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Which version of DOcplex are you using? is it the latest version (2.15.194 of last July), if not can you update?

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 10:57 AM
From: sana naz
Subject: Model problems with docplex and cplex on python

Thanks , I used your code but I got this error:
AttributeError: 'CplexEngine' object has no attribute '_sync_equivalence_cts'

------------------------------
sana naz


Original Message:
Sent: Mon September 28, 2020 10:07 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne

Hi again.
I tried the new command but still facing the same error. Is there another way to resolve this issue?

------------------------------
Sana Nazari
------------------------------

Original Message:
Sent: Mon October 12, 2020 04:10 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Since 2.11 , the way to build distributions of DOcplex has changed. Still, there is a way to force the upgrade, using:

   pip install --upgrade --force-reinstall docplex

The "--force-reinstall" should force Python to upgrade DOcplex, even if the build method has changed. Running `pip freeze` afterwards, you should see 2.15 installed.

           PHilippe.



------------------------------
Philippe Couronne
------------------------------


Original Message:
Sent: Fri October 09, 2020 05:10 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

Hi,
I tried your solution on two different machines and got this error:

ERROR: Cannot uninstall 'docplex'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

------------------------------
Sana Nazari


Original Message:
Sent: Wed September 30, 2020 08:28 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Ok, let's try the following command, from where you ran `pip freeze`:


> pip install --upgrade docplex

This should uninstall the old 2.11 and replace it with 2.15, . You can rerun `pip freeze to check that it worked.
Then the code workaround I sent should work; no surprise it didn't work with 2.11.
Let me know if this works.

   Philippe.

------------------------------
Philippe Couronne


Original Message:
Sent: Wed September 30, 2020 06:24 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

- I have windows 10
- python =3.6
- using anaconda3 -anaconda-navigator==1.9.12
-  Cplex Studio version 12.10.0
- docplex==2.11.176

------------------------------
sana naz


Original Message:
Sent: Wed September 30, 2020 05:27 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

DOcplex is a pure python module, so it has a faster release cycle than Cplex Studio.
Before going further can you provide the following informations:

- what is your platform? (windows, Linux, MacOs)?
- what is your version of python? (output of `python --version`)
- what is your version of anaconda?
- what version of Cplex Studio are you using?

And finally, what is the output of the `pip freeze` command?\
You should see one line with `docplex=2.xxx` in it.

From there, I can advise a safe course of actions to upgrade DOcplex to the latest version.


     Philippe.

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 12:00 PM
From: sana naz
Subject: Model problems with docplex and cplex on python

I have version 2.0 but I did not install it directly. I installed cplex studio with the academic licence. I don't know how can i upgrade that since there is no new version of cplex studio (latest I have is 12.10) and my system doesn't recognize docplex by itself in order to upgrade. 
Is it OK if I install docplex again with conda and upgrade?

------------------------------
sana naz


Original Message:
Sent: Tue September 29, 2020 11:02 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Which version of DOcplex are you using? is it the latest version (2.15.194 of last July), if not can you update?

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 10:57 AM
From: sana naz
Subject: Model problems with docplex and cplex on python

Thanks , I used your code but I got this error:
AttributeError: 'CplexEngine' object has no attribute '_sync_equivalence_cts'

------------------------------
sana naz


Original Message:
Sent: Mon September 28, 2020 10:07 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne

Hi,

  It seems your version of "pip" should be upgraded too. So, let's proceed in two phases:

1. upgrade "pip" command, run the following command:


This should install the latest version of pip. You can check with with "pip --version"

2. Do not try uninstall, force a "brutal" installation of DOcplex with this command:

pip install --ignore-installed -U docplex

By this command, we force an installation of docplex, regardless of what was installed before, without trying to uninistall. The "-U" is for upgrade.

At the end of the day, you should have 2.15 installed (check with pip freeze)


Let me know if this works.

        Philippe.





------------------------------
Philippe Couronne
------------------------------

Original Message:
Sent: Tue October 13, 2020 10:27 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

Hi again.
I tried the new command but still facing the same error. Is there another way to resolve this issue?

------------------------------
Sana Nazari
------------------------------


Original Message:
Sent: Mon October 12, 2020 04:10 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Since 2.11 , the way to build distributions of DOcplex has changed. Still, there is a way to force the upgrade, using:

   pip install --upgrade --force-reinstall docplex

The "--force-reinstall" should force Python to upgrade DOcplex, even if the build method has changed. Running `pip freeze` afterwards, you should see 2.15 installed.

           PHilippe.



------------------------------
Philippe Couronne


Original Message:
Sent: Fri October 09, 2020 05:10 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

Hi,
I tried your solution on two different machines and got this error:

ERROR: Cannot uninstall 'docplex'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

------------------------------
Sana Nazari


Original Message:
Sent: Wed September 30, 2020 08:28 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Ok, let's try the following command, from where you ran `pip freeze`:


> pip install --upgrade docplex

This should uninstall the old 2.11 and replace it with 2.15, . You can rerun `pip freeze to check that it worked.
Then the code workaround I sent should work; no surprise it didn't work with 2.11.
Let me know if this works.

   Philippe.

------------------------------
Philippe Couronne


Original Message:
Sent: Wed September 30, 2020 06:24 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

- I have windows 10
- python =3.6
- using anaconda3 -anaconda-navigator==1.9.12
-  Cplex Studio version 12.10.0
- docplex==2.11.176

------------------------------
sana naz


Original Message:
Sent: Wed September 30, 2020 05:27 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

DOcplex is a pure python module, so it has a faster release cycle than Cplex Studio.
Before going further can you provide the following informations:

- what is your platform? (windows, Linux, MacOs)?
- what is your version of python? (output of `python --version`)
- what is your version of anaconda?
- what version of Cplex Studio are you using?

And finally, what is the output of the `pip freeze` command?\
You should see one line with `docplex=2.xxx` in it.

From there, I can advise a safe course of actions to upgrade DOcplex to the latest version.


     Philippe.

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 12:00 PM
From: sana naz
Subject: Model problems with docplex and cplex on python

I have version 2.0 but I did not install it directly. I installed cplex studio with the academic licence. I don't know how can i upgrade that since there is no new version of cplex studio (latest I have is 12.10) and my system doesn't recognize docplex by itself in order to upgrade. 
Is it OK if I install docplex again with conda and upgrade?

------------------------------
sana naz


Original Message:
Sent: Tue September 29, 2020 11:02 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Which version of DOcplex are you using? is it the latest version (2.15.194 of last July), if not can you update?

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 10:57 AM
From: sana naz
Subject: Model problems with docplex and cplex on python

Thanks , I used your code but I got this error:
AttributeError: 'CplexEngine' object has no attribute '_sync_equivalence_cts'

------------------------------
sana naz


Original Message:
Sent: Mon September 28, 2020 10:07 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne

Thank you Philippe. Both of your methods worked!

------------------------------
Sana Nazari
------------------------------

Original Message:
Sent: Wed October 14, 2020 04:58 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hi,

  It seems your version of "pip" should be upgraded too. So, let's proceed in two phases:

1. upgrade "pip" command, run the following command:

10:08

python -m pip install --upgrade pip

This should install the latest version of pip. You can check with with "pip --version"

2. Do not try uninstall, force a "brutal" installation of DOcplex with this command:

pip install --ignore-installed -U docplex

By this command, we force an installation of docplex, regardless of what was installed before, without trying to uninistall. The "-U" is for upgrade.

At the end of the day, you should have 2.15 installed (check with pip freeze)


Let me know if this works.

        Philippe.

pip install --ignore-installed -U docplex

10:08

python -m pip install --upgrade pip

------------------------------
Philippe Couronne
------------------------------


Original Message:
Sent: Tue October 13, 2020 10:27 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

Hi again.
I tried the new command but still facing the same error. Is there another way to resolve this issue?

------------------------------
Sana Nazari


Original Message:
Sent: Mon October 12, 2020 04:10 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Since 2.11 , the way to build distributions of DOcplex has changed. Still, there is a way to force the upgrade, using:

   pip install --upgrade --force-reinstall docplex

The "--force-reinstall" should force Python to upgrade DOcplex, even if the build method has changed. Running `pip freeze` afterwards, you should see 2.15 installed.

           PHilippe.



------------------------------
Philippe Couronne


Original Message:
Sent: Fri October 09, 2020 05:10 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

Hi,
I tried your solution on two different machines and got this error:

ERROR: Cannot uninstall 'docplex'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

------------------------------
Sana Nazari


Original Message:
Sent: Wed September 30, 2020 08:28 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Ok, let's try the following command, from where you ran `pip freeze`:


> pip install --upgrade docplex

This should uninstall the old 2.11 and replace it with 2.15, . You can rerun `pip freeze to check that it worked.
Then the code workaround I sent should work; no surprise it didn't work with 2.11.
Let me know if this works.

   Philippe.

------------------------------
Philippe Couronne


Original Message:
Sent: Wed September 30, 2020 06:24 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

- I have windows 10
- python =3.6
- using anaconda3 -anaconda-navigator==1.9.12
-  Cplex Studio version 12.10.0
- docplex==2.11.176

------------------------------
sana naz


Original Message:
Sent: Wed September 30, 2020 05:27 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

DOcplex is a pure python module, so it has a faster release cycle than Cplex Studio.
Before going further can you provide the following informations:

- what is your platform? (windows, Linux, MacOs)?
- what is your version of python? (output of `python --version`)
- what is your version of anaconda?
- what version of Cplex Studio are you using?

And finally, what is the output of the `pip freeze` command?\
You should see one line with `docplex=2.xxx` in it.

From there, I can advise a safe course of actions to upgrade DOcplex to the latest version.


     Philippe.

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 12:00 PM
From: sana naz
Subject: Model problems with docplex and cplex on python

I have version 2.0 but I did not install it directly. I installed cplex studio with the academic licence. I don't know how can i upgrade that since there is no new version of cplex studio (latest I have is 12.10) and my system doesn't recognize docplex by itself in order to upgrade. 
Is it OK if I install docplex again with conda and upgrade?

------------------------------
sana naz


Original Message:
Sent: Tue September 29, 2020 11:02 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Which version of DOcplex are you using? is it the latest version (2.15.194 of last July), if not can you update?

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 10:57 AM
From: sana naz
Subject: Model problems with docplex and cplex on python

Thanks , I used your code but I got this error:
AttributeError: 'CplexEngine' object has no attribute '_sync_equivalence_cts'

------------------------------
sana naz


Original Message:
Sent: Mon September 28, 2020 10:07 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne

Hi there,

Older versions of pip just copied the files without keeping track of what is installed, and newer versions of pip just raise this error to be sure.
In the case of docplex, there is only one directory installed so you are safe to ignore what was previously installed.

If I were you, I would do this. First update pip:

python -m pip install --upgrade pip

Then install docplex, ignoring previous install: 

pip install --ignore-installed -U docplex

------------------------------
Viu Long Kong
------------------------------

Original Message:
Sent: Tue October 13, 2020 10:27 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

Hi again.
I tried the new command but still facing the same error. Is there another way to resolve this issue?

------------------------------
Sana Nazari
------------------------------


Original Message:
Sent: Mon October 12, 2020 04:10 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Since 2.11 , the way to build distributions of DOcplex has changed. Still, there is a way to force the upgrade, using:

   pip install --upgrade --force-reinstall docplex

The "--force-reinstall" should force Python to upgrade DOcplex, even if the build method has changed. Running `pip freeze` afterwards, you should see 2.15 installed.

           PHilippe.



------------------------------
Philippe Couronne


Original Message:
Sent: Fri October 09, 2020 05:10 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

Hi,
I tried your solution on two different machines and got this error:

ERROR: Cannot uninstall 'docplex'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

------------------------------
Sana Nazari


Original Message:
Sent: Wed September 30, 2020 08:28 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Ok, let's try the following command, from where you ran `pip freeze`:


> pip install --upgrade docplex

This should uninstall the old 2.11 and replace it with 2.15, . You can rerun `pip freeze to check that it worked.
Then the code workaround I sent should work; no surprise it didn't work with 2.11.
Let me know if this works.

   Philippe.

------------------------------
Philippe Couronne


Original Message:
Sent: Wed September 30, 2020 06:24 AM
From: Sana Nazari
Subject: Model problems with docplex and cplex on python

- I have windows 10
- python =3.6
- using anaconda3 -anaconda-navigator==1.9.12
-  Cplex Studio version 12.10.0
- docplex==2.11.176

------------------------------
sana naz


Original Message:
Sent: Wed September 30, 2020 05:27 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

DOcplex is a pure python module, so it has a faster release cycle than Cplex Studio.
Before going further can you provide the following informations:

- what is your platform? (windows, Linux, MacOs)?
- what is your version of python? (output of `python --version`)
- what is your version of anaconda?
- what version of Cplex Studio are you using?

And finally, what is the output of the `pip freeze` command?\
You should see one line with `docplex=2.xxx` in it.

From there, I can advise a safe course of actions to upgrade DOcplex to the latest version.


     Philippe.

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 12:00 PM
From: sana naz
Subject: Model problems with docplex and cplex on python

I have version 2.0 but I did not install it directly. I installed cplex studio with the academic licence. I don't know how can i upgrade that since there is no new version of cplex studio (latest I have is 12.10) and my system doesn't recognize docplex by itself in order to upgrade. 
Is it OK if I install docplex again with conda and upgrade?

------------------------------
sana naz


Original Message:
Sent: Tue September 29, 2020 11:02 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Which version of DOcplex are you using? is it the latest version (2.15.194 of last July), if not can you update?

------------------------------
Philippe Couronne


Original Message:
Sent: Tue September 29, 2020 10:57 AM
From: sana naz
Subject: Model problems with docplex and cplex on python

Thanks , I used your code but I got this error:
AttributeError: 'CplexEngine' object has no attribute '_sync_equivalence_cts'

------------------------------
sana naz


Original Message:
Sent: Mon September 28, 2020 10:07 AM
From: Philippe Couronne
Subject: Model problems with docplex and cplex on python

Hello Sana,

  Thanks for your explanations, I now understand better. If you solve directly at the "cplex" level, then some parts of the model have not been synchronized yet,
among them logical equivalences, so this might well explain your issues. I am attaching a small function, to be inserted just before calling `populate`, which should
perform this missing synchronization. This code uses undocumented methods.
The good news is, the next version of DOcplex will support solution pools directly , removing the need for these workarounds.
Let me know if this works.

      Philippe.


def sync_cplex(mdl): # call this method before cplex.populate() print(f"-- synchronize cplex parameters") mdl.apply_parameters() eng = mdl.get_engine() # wrap all syncs print(f"-- synchronize variable bounds ") eng._sync_var_bounds() eng._sync_annotations(mdl) print(f"-- synchronize equivalence cts") eng._sync_equivalence_cts(mdl)


------------------------------
Philippe Couronne