[TRNSYS-users] Problem with GenOpt and TRNOpt: discrete variable

[Alexis Fabre (Trainee 3E)]

Dear TRNSyst user,

I try to optimize a system with TRNOpt. I have the total cost of my system to minimize depending on 2 variables (one continuous and one discrete which can take 3 values).
When I run TRNOpt with my system which depends only on the continuous variable (for instance with Hooke-Jeeves) it works really well, great.
But when I try to add the dependence with de second variable (i.e the discrete variable and the continuous variable) it does not work.
I received the error on the GenOpt window:
"GenOpt terminated with error.
See logfile for further information"

I received the error when I used the algorithm with these parameters:
Hybrid for Continuous and Discrete
NeighborhoodTopology = gbest
NeighborhoodSize = 1
NumberOfParticle = 0
NumberOfGeneration = 0
Seed = 0
CognitiveAcceleration = 0.5
SocialAcceleration = 0.5
MaxVelocityGainContinuous = 0
MaxVelocityDiscrete = 0.5
ConstrictionGain = 0.5
MeshSizeDivider = 2
InitialMeshSizeExponent = 0
MeshSizeExponentIncrement = 1
NumberOfStepReduction = 4

I attach the logfile to this mail and the file where there are all the parameters for TRNOpt

I tried other algorithms and I received the same error except for the "parametric" where it worked but with some errors at the beginning which I paste at the end of this mail.
I do not know which algorithm is the best one to use when I want to optimize a system with a continuous and a discrete variable (the discrete variable has to take three values: 1,2,3)
Maybe somebody has an idea which can help me to find the solution of my problem?

Thanks a lot

Alexis Fabre


**** Warning ****
Simulation 1: Exception in evaluating x = ( 20.0; 0).

Exception in executing the simulation program

Current command String: 'C:\Program Files\Trnsys16\Exe\TRNEXE.EXE "C:\Program Files\Trnsys16\optimization\GENOPT\SIMULATION\GenoptInputFile.DCK" /n /WAIT '.
Exception message:

Error in executing the simulation program
Exit value of the simulation program: 1
Current command String              : 'C:\Program Files\Trnsys16\Exe\TRNEXE.EXE "C:\Program Files\Trnsys16\optimization\GENOPT\SIMULATION\GenoptInputFile.DCK" /n /WAIT '.
Error stream of simulation program  : Simulation program did not return an error stream.


**** Info ****
Simulation 2: Caught 'java.lang.Exception' with message:
Exception in executing the simulation program

Current command String: 'C:\Program Files\Trnsys16\Exe\TRNEXE.EXE "C:\Program Files\Trnsys16\optimization\GENOPT\SIMULATION\GenoptInputFile.DCK" /n /WAIT '.
Exception message:

Error in executing the simulation program
Exit value of the simulation program: 1
Current command String              : 'C:\Program Files\Trnsys16\Exe\TRNEXE.EXE "C:\Program Files\Trnsys16\optimization\GENOPT\SIMULATION\GenoptInputFile.DCK" /n /WAIT '.
Error stream of simulation program  : Simulation program did not return an error stream.

   Try to evaluate simulation a second time.

**** Warning ****
Simulation 2: Exception in evaluating x = ( 44.0; 0).

Exception in executing the simulation program

Current command String: 'C:\Program Files\Trnsys16\Exe\TRNEXE.EXE "C:\Program Files\Trnsys16\optimization\GENOPT\SIMULATION\GenoptInputFile.DCK" /n /WAIT '.
Exception message:

Error in executing the simulation program
Exit value of the simulation program: 1
Current command String              : 'C:\Program Files\Trnsys16\Exe\TRNEXE.EXE "C:\Program Files\Trnsys16\optimization\GENOPT\SIMULATION\GenoptInputFile.DCK" /n /WAIT '.
Error stream of simulation program  : Simulation program did not return an error stream.





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Alexis Fabre

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