Dear all,
Is there any way that I print out, or have access to all cuts generated and added by CPLEX to the model during the cutting plane algorithm? I just want to analyze those cuts. If you have this experience I appreciate it if you share how it can be done, regardless of the programming language that you used.

------------------------------
Babak Akbarzadeh
------------------------------

#DecisionOptimization

I'm afraid the answer is no: there is no API to gain access to the cuts, whether when they are generated or when they are actually added to the model.

------------------------------
Xavier
------------------------------

Original Message:
Sent: Mon March 14, 2022 11:51 AM
From: Babak Akbarzadeh
Subject: Accessing to Cuts added by CPLEX

Dear all,
Is there any way that I print out, or have access to all cuts generated and added by CPLEX to the model during the cutting plane algorithm? I just want to analyze those cuts. If you have this experience I appreciate it if you share how it can be done, regardless of the programming language that you used.

------------------------------
Babak Akbarzadeh
------------------------------

#DecisionOptimization

Dear Xavier,
Thank you, I thought so.

------------------------------
Babak Akbarzadeh
------------------------------

Original Message:
Sent: Mon March 14, 2022 01:00 PM
From: Xavier Nodet
Subject: Accessing to Cuts added by CPLEX

I'm afraid the answer is no: there is no API to gain access to the cuts, whether when they are generated or when they are actually added to the model.

------------------------------
Xavier

Original Message:
Sent: Mon March 14, 2022 11:51 AM
From: Babak Akbarzadeh
Subject: Accessing to Cuts added by CPLEX

Dear all,
Is there any way that I print out, or have access to all cuts generated and added by CPLEX to the model during the cutting plane algorithm? I just want to analyze those cuts. If you have this experience I appreciate it if you share how it can be done, regardless of the programming language that you used.

------------------------------
Babak Akbarzadeh
------------------------------

#DecisionOptimization

Hi Xavier,

I am actually surprised at this answer to the OP.

Surely, one can within a user cut callback have have CPLEX print the lp file via CPXgetcallbacknodelp to print the LP file at the current node, yes? I am still in CPLEX 12.10. Is this no longer possible in the latest CPLEX version? I sure hope not!

Babak, can you look at https://www.ibm.com/docs/en/icos/20.1.0?topic=g-cpxxgetcallbacknodelp-cpxgetcallbacknodelp and try to see if that would work? I use this routinely in CPLEX 12.10 to examine cuts I add and what CPLEX adds. The CPLEX added cuts will have some mnemonics such as r1, m1, etc. that the user cannot control.

Thanks.

------------------------------
CPLEX User
------------------------------

Original Message:
Sent: Mon March 14, 2022 01:00 PM
From: Xavier Nodet
Subject: Accessing to Cuts added by CPLEX

I'm afraid the answer is no: there is no API to gain access to the cuts, whether when they are generated or when they are actually added to the model.

------------------------------
Xavier

Original Message:
Sent: Mon March 14, 2022 11:51 AM
From: Babak Akbarzadeh
Subject: Accessing to Cuts added by CPLEX

Dear all,
Is there any way that I print out, or have access to all cuts generated and added by CPLEX to the model during the cutting plane algorithm? I just want to analyze those cuts. If you have this experience I appreciate it if you share how it can be done, regardless of the programming language that you used.

------------------------------
Babak Akbarzadeh
------------------------------

#DecisionOptimization

Hi,
Thank you for sharing. Indeed my colleague has also the same experience using Callbacks to retrieve cuts, as you say. I've been working on this, I will post my findings here, for others if they are interested.

------------------------------
Babak Akbarzadeh
------------------------------

Original Message:
Sent: Wed March 16, 2022 12:07 PM
From: CPLEX User
Subject: Accessing to Cuts added by CPLEX

Hi Xavier,

I am actually surprised at this answer to the OP.

Surely, one can within a user cut callback have have CPLEX print the lp file via CPXgetcallbacknodelp to print the LP file at the current node, yes? I am still in CPLEX 12.10. Is this no longer possible in the latest CPLEX version? I sure hope not!

Babak, can you look at https://www.ibm.com/docs/en/icos/20.1.0?topic=g-cpxxgetcallbacknodelp-cpxgetcallbacknodelp and try to see if that would work? I use this routinely in CPLEX 12.10 to examine cuts I add and what CPLEX adds. The CPLEX added cuts will have some mnemonics such as r1, m1, etc. that the user cannot control.

Thanks.

------------------------------
CPLEX User

Original Message:
Sent: Mon March 14, 2022 01:00 PM
From: Xavier Nodet
Subject: Accessing to Cuts added by CPLEX

I'm afraid the answer is no: there is no API to gain access to the cuts, whether when they are generated or when they are actually added to the model.

------------------------------
Xavier

Original Message:
Sent: Mon March 14, 2022 11:51 AM
From: Babak Akbarzadeh
Subject: Accessing to Cuts added by CPLEX

Dear all,
Is there any way that I print out, or have access to all cuts generated and added by CPLEX to the model during the cutting plane algorithm? I just want to analyze those cuts. If you have this experience I appreciate it if you share how it can be done, regardless of the programming language that you used.

------------------------------
Babak Akbarzadeh
------------------------------

#DecisionOptimization

There is not change in the callbacks in 20.1 or the coming 22.1, but it's true that there is no built-in method to query the cuts and use them programmatically. It's true that with your method you can obtain them, but it is very hard to use them in an application.

------------------------------
Vincent Beraudier
------------------------------

Original Message:
Sent: Wed March 16, 2022 12:07 PM
From: CPLEX User
Subject: Accessing to Cuts added by CPLEX

Hi Xavier,

I am actually surprised at this answer to the OP.

Surely, one can within a user cut callback have have CPLEX print the lp file via CPXgetcallbacknodelp to print the LP file at the current node, yes? I am still in CPLEX 12.10. Is this no longer possible in the latest CPLEX version? I sure hope not!

Babak, can you look at https://www.ibm.com/docs/en/icos/20.1.0?topic=g-cpxxgetcallbacknodelp-cpxgetcallbacknodelp and try to see if that would work? I use this routinely in CPLEX 12.10 to examine cuts I add and what CPLEX adds. The CPLEX added cuts will have some mnemonics such as r1, m1, etc. that the user cannot control.

Thanks.

------------------------------
CPLEX User

Original Message:
Sent: Mon March 14, 2022 01:00 PM
From: Xavier Nodet
Subject: Accessing to Cuts added by CPLEX

I'm afraid the answer is no: there is no API to gain access to the cuts, whether when they are generated or when they are actually added to the model.

------------------------------
Xavier

Original Message:
Sent: Mon March 14, 2022 11:51 AM
From: Babak Akbarzadeh
Subject: Accessing to Cuts added by CPLEX

Dear all,
Is there any way that I print out, or have access to all cuts generated and added by CPLEX to the model during the cutting plane algorithm? I just want to analyze those cuts. If you have this experience I appreciate it if you share how it can be done, regardless of the programming language that you used.

------------------------------
Babak Akbarzadeh
------------------------------

#DecisionOptimization

Yes. Indeed my usage of CPXgetcallbacknodelp is only to examine the cuts offline.

Programmatic manipulation is not possible as you and Xavier have suggested. It is just that the OP wanted to examine / analyze the CPLEX cuts offline in a non-production environment and I felt that he may benefit from the user cut callback.

Regards

------------------------------
CPLEX User
------------------------------

Original Message:
Sent: Thu March 17, 2022 10:38 AM
From: Vincent Beraudier
Subject: Accessing to Cuts added by CPLEX

There is not change in the callbacks in 20.1 or the coming 22.1, but it's true that there is no built-in method to query the cuts and use them programmatically. It's true that with your method you can obtain them, but it is very hard to use them in an application.

------------------------------
Vincent Beraudier

Original Message:
Sent: Wed March 16, 2022 12:07 PM
From: CPLEX User
Subject: Accessing to Cuts added by CPLEX

Hi Xavier,

I am actually surprised at this answer to the OP.

Surely, one can within a user cut callback have have CPLEX print the lp file via CPXgetcallbacknodelp to print the LP file at the current node, yes? I am still in CPLEX 12.10. Is this no longer possible in the latest CPLEX version? I sure hope not!

Babak, can you look at https://www.ibm.com/docs/en/icos/20.1.0?topic=g-cpxxgetcallbacknodelp-cpxgetcallbacknodelp and try to see if that would work? I use this routinely in CPLEX 12.10 to examine cuts I add and what CPLEX adds. The CPLEX added cuts will have some mnemonics such as r1, m1, etc. that the user cannot control.

Thanks.

------------------------------
CPLEX User

Original Message:
Sent: Mon March 14, 2022 01:00 PM
From: Xavier Nodet
Subject: Accessing to Cuts added by CPLEX

I'm afraid the answer is no: there is no API to gain access to the cuts, whether when they are generated or when they are actually added to the model.

------------------------------
Xavier

Original Message:
Sent: Mon March 14, 2022 11:51 AM
From: Babak Akbarzadeh
Subject: Accessing to Cuts added by CPLEX

Dear all,
Is there any way that I print out, or have access to all cuts generated and added by CPLEX to the model during the cutting plane algorithm? I just want to analyze those cuts. If you have this experience I appreciate it if you share how it can be done, regardless of the programming language that you used.

------------------------------
Babak Akbarzadeh
------------------------------

#DecisionOptimization