fatal_limits_exceeded(self, nb_vars, nb_constraints) | DOcplexException

Answered

Tino Zepeck

December 22, 2022 08:36

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Hello, 

I'm a master student and have the WLS Academic licence. I'm using google colab.

I try to write following objective function:

 obj2_kosten_pro_einheit= sum(schichtbausteine_laka[s]['Durchschnittliche Herstellkosten pro Einheit [€/Eh]'][d]* m.get_var_by_name("x_laka_"+str(s)+"_"+str(d))+schichtbausteine_tmo[s]['Durchschnittliche Herstellkosten pro Einheit [€/Eh]'][d]* m.get_var_by_name("x_tmo_"+str(s)+"_"+str(d)) for d in days for s in schichten)/sum(schichtbausteine_laka[s]['Schichtbausteinausbringung [Eh]'][d]* m.get_var_by_name("x_laka_"+str(s)+"_"+str(d))+schichtbausteine_tmo[s]['Schichtbausteinausbringung [Eh]'][d]* m.get_var_by_name("x_tmo_"+str(s)+"_"+str(d))for d in days for s in schichten)

 

Alls vars are binary

 

Unfortunately I get following error message:

/usr/local/lib/python3.8/dist-packages/docplex/mp/error_handler.py in fatal(self, msg, args) 208 resolved_message = resolve_pattern(msg, args) 209 docplex_error_stop_here() --> 210 raise DOcplexException(resolved_message) 211 212 def fatal_limits_exceeded(self, nb_vars, nb_constraints):

DOcplexException: 

even my model has only 198 variables. 

 

Model: Werk1 - number of variables: 198 - binary=192, integer=6, continuous=0 -

number of constraints: 357 - linear=103, indicator=218, equiv=36 -

parameters: defaults - objective: none - problem type is: MIL

 

Please, can you help me?

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 13, 2026 01:51

  This post is more than two years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum, or try Gurobot, our chatbot interface offering instant, expert-level support.
• 

  Mario Ruthmair

  • Gurobi Staff

  December 27, 2022 13:36

  Hi Tino,

  The exception you got comes from CPLEX, not Gurobi.
  So, if you moved from CPLEX to Gurobi there might be still some CPLEX parts left?

  Best regards,
  Mario

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  Tino Zepeck

  January 02, 2023 22:14

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  Hi Mario,

  I'm sorry you're totaly right.

   

  Best regards

  Tino 

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