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ALEX FLEISCHER

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RE: Docplex error on IBM Cloud solving large MILP : result too large

Posted By ALEX FLEISCHER Thu May 02, 2024 06:03 AM
Found In Egroup: Decision Optimization \ view thread
Hi, you should move to referenced data: Decision Optimization model input and output data - Docs | IBM watsonx regards ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] ------------------------------

RE: How to define an JIT objective besides Cmax

Posted By ALEX FLEISCHER Mon April 29, 2024 01:52 AM
Found In Egroup: Decision Optimization \ view thread
Hi, have you had a look at the example at https://github.com/IBMDecisionOptimization/docplex-examples/blob/master/examples/cp/jupyter/scheduling_tuto.ipynb ? The problem consists of assigning start dates to tasks in such a way that the resulting schedule satisfies precedence constraints and minimizes ...

RE: Re: opl

Posted By ALEX FLEISCHER Wed April 24, 2024 05:07 AM
Found In Egroup: Decision Optimization \ view thread
And a nice book : https://www.amazon.com/Decision-Optimization-CPLEX-Studio-Hands/dp/3662654806 And a youtube tutorial https://www.youtube.com/playlist?list=PLyY17uOd5sPNgeqy2CguqyW0IENeEW4kS And many links at https://www.linkedin.com/pulse/low-barrier-entry-optimization-throug ...

RE: Setting bounds in OPL

Posted By ALEX FLEISCHER Thu April 18, 2024 03:29 AM
Found In Egroup: Decision Optimization \ view thread
Hi, to understand what went wrong you can export .lp In my example https://github.com/AlexFleischerParis/zooopl/blob/master/zooincremental.mod I added the export cplex.exportModel("test.lp"); int nbKids=300; float costBus40=500; float costBus30=400; ...

RE: CPLEX Optimization Studio Acadimic Version

Posted By ALEX FLEISCHER Tue April 16, 2024 09:41 AM
Found In Egroup: Decision Optimization \ view thread
Indeed the academic version has no limits on the number of variables and constraints. ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] ------------------------------

RE: CPLEX Optimization Studio Acadimic Version

Posted By ALEX FLEISCHER Mon April 15, 2024 12:26 PM
Found In Egroup: Decision Optimization \ view thread
Have you tried the link Academic Version in https://www.linkedin.com/pulse/what-free-ibm-cplex-alex-fleischer/ ? ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] ------------------------------

RE: print output to terminal in OPL

Posted By ALEX FLEISCHER Mon April 15, 2024 08:07 AM
Found In Egroup: Decision Optimization \ view thread
Many links in https://www.linkedin.com/pulse/low-barrier-entry-optimization-through-cplex-alex-fleischer ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] ------------------------------

RE: print output to terminal in OPL

Posted By ALEX FLEISCHER Mon April 15, 2024 07:44 AM
Found In Egroup: Decision Optimization \ view thread
in CPLEX_Studio2211\opl\examples\opl_interfaces\cpp\src oplrunsample.cpp you should not forget opl.postProcess(); which handles the display of a solution ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] -------------------------- ...

RE: print output to terminal in OPL

Posted By ALEX FLEISCHER Sat April 13, 2024 02:47 AM
Found In Egroup: Decision Optimization \ view thread
Hi have you used oplrun to run your .mod file ? regards ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] ------------------------------

RE: Variable indexer size not allowed for a generic array

Posted By ALEX FLEISCHER Wed April 03, 2024 09:05 AM
Found In Egroup: Decision Optimization \ view thread
You re welcome https://medium.com/ibm-data-ai/optimization-simply-do-more-with-less-zoo-buses-and-kids-66940178db6 ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] ------------------------------

RE: Variable indexer size not allowed for a generic array

Posted By ALEX FLEISCHER Wed April 03, 2024 08:11 AM
Found In Egroup: Decision Optimization \ view thread
Hi, I updated the file for union regards ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] ------------------------------

RE: Maximum number of CPU core which can use in CPLEX

Posted By ALEX FLEISCHER Tue April 02, 2024 12:34 PM
Found In Egroup: Decision Optimization \ view thread
The documentation says: Threads parameter Describes the effect of the threads parameter in parallel. You manage the number of threads that CPLEX uses with the global thread count parameter (Threads, CPX_PARAM_THREADS) documented in the CPLEX Parameters Reference Manual. At its default ...

RE: Variable indexer size not allowed for a generic array

Posted By ALEX FLEISCHER Tue April 02, 2024 07:04 AM
Found In Egroup: Decision Optimization \ view thread
In https://www.linkedin.com/pulse/making-decision-optimization-simple-alex-fleischer/ array variable indexer size - 3 ways : union , tuple set, decision expression ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] ------------------------------

RE: Making dummy data for 4 Dimensional Data

Posted By ALEX FLEISCHER Mon April 01, 2024 01:32 PM
Found In Egroup: Decision Optimization \ view thread
Hi you can use random /* Sets */ int I = 4; int J = 5; int T = 10; range Products = 1..I;/* Set of Blood Products */ range Locations = 1..J;/* Set of Locations of the hospitals */ range Time = 1..T;/* Set of Time Periods */ /* Parameters */ int Transportcost[p in Products][l ...

RE: Installing

Posted By ALEX FLEISCHER Sat March 30, 2024 02:55 AM
Found In Egroup: Decision Optimization \ view thread
Hi you use Linux but what is the hardware ? x86 or power machine ? https://en.m.wikipedia.org/wiki/IBM_Power_Systems regards ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] ------------------------------

RE: Installing

Posted By ALEX FLEISCHER Fri March 29, 2024 03:02 AM
Found In Egroup: Decision Optimization \ view thread
Hi, what is the exact name of the file ? I see for instance cplex_studio2211.linux_x86_64.bin for linux regards ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] ------------------------------

RE: CPLEX gets stuck in "Performing restart"

Posted By ALEX FLEISCHER Mon March 25, 2024 06:50 AM
Found In Egroup: Decision Optimization \ view thread
Hi How to contact our support team ? https://www.ibm.com/support/pages/contact-decision-optimization-support-team regards ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] ------------------------------

RE: Help!

Posted By ALEX FLEISCHER Wed March 20, 2024 11:50 AM
Found In Egroup: Decision Optimization \ view thread
Hi, do you run the OPL IDE ? Can you share a screenshot ? regards ------------------------------ [Alex] [Fleischer] [Data and AI Technical Sales] [IBM] ------------------------------

IBM Research Ponder This

Posted By ALEX FLEISCHER Wed March 20, 2024 11:44 AM
Found In Egroup: watsonx.ai \ view thread
For PIDAY 2024 I shared a 1 minute video about the IBM Research Ponder This challenge which is according to many customers very addictive. And by the way, in the past 10 years I have mainly used CPLEX / Decision Optimization in watsonx.ai or more recently genAI within watsonx.ai ...

RE: Pass CPLEX parameters when deploying LP/MPS model to WML

Posted By ALEX FLEISCHER Tue March 19, 2024 10:55 AM
Found In Egroup: Decision Optimization \ view thread
Hi, as we can read in https://medium.com/@AlainChabrier/cplex-and-cpo-file-formats-with-do-experiments-in-cloud-pak-for-data-a2abf93c9c18 Beside the LP file, it is still possible to add additional files, such as a .prm file to set some parameters to be taken into account when solving ...