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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• 

  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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