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

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.

Alexis Fabre

Kalkkaai 6
Quai à la Chaux
B-1000 Brussels

T +32 2 217 58 68
F +32 2 219 79 89

3E sa/nv Headquarters (Invoicing Address)

Vaartstraat 61 Rue du Canal, B-1000 Brussels

Visit us at www.3E.eu

Not facing but shaping the changes

SAVE PAPER: THINK TWICE BEFORE PRINTING!

This email is strictly confidential and intended solely for the use of the individual to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of 3E. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing or copying of this email is strictly prohibited.