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RS00429: MATLAB TOOLBOX FUNCTIONS THAT OPTIMIZE MODELS DON'T PROPERLY SUPPORT EMPTY CONSTRAINTS.

A fix is available

IBM ILOG CPLEX Optimization Studio Academic Research Edition Fix Pack 12.2.0.2

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APAR status

  • Closed as program error.

Error description

  • An empty constraint should be accepted (and essentially ignored)
in the optimization that follows any specification of a model.
However, the Matlab toolbox functions do no properly handle
such empty constraints.   Example:


cplexmiqp(eye(2),[0;0],[],[])

Local fix

  • There is never a real need to include an empty constraint in
the model specification.   If the constraint is empty, don't
include it.   However, if it is convenient to do so, download
CPLEX 12.2.0.1, which fixes the problem.

Problem summary

  • Constraints without any nonzero entries should be acceptable,
yet the MATLAB API has some toolbox API functions that don't
accept them.

Problem conclusion

  • Fixed in 12.2.0.1

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    RS00429
    • 

  • Reported component name
    ILOG OPL-CPLEX
    • 

  • Reported component ID
    5724Y5400
    • 

  • Reported release
    C20
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    YesHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2010-10-06
    • 

  • Closed date
    2010-10-22
    • 

  • Last modified date
    2010-10-22
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Modules/Macros


    

  • MATLAB

    



Fix information


    

  • Fixed component name
    ILOG OPL-CPLEX
    • 

  • Fixed component ID
    5724Y5400
    • 



Applicable component levels


    

  • RC20  PSY
       UP
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            22 October 2010
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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