[TRNSYS-users] Fwd: I/O error 32 using TRNOPT

[David BRADLEY]

Michel,

  I am afraid I do not know what the cause of that error is although I 
have run into it myself. I always assumed it had to do with a simulation 
being launched (automatically by GenOpt) when some other TRNSYS (or 
GenOpt) process had not yet completed and that the reason it runs after 
clicking the message away is that by that point the process has 
completed. I have not run into this behavior lately (in the past few 
years) so it may be that a more recent version of TRNOpt/GenOpt is the 
answer.

kind regards,

  David



On 11/14/2018 03:56, Michel Tamarzians via TRNSYS-users wrote:
> Dear all,
>
> Once again I need some help with TRNSYS/TRNOPT.
> I am trying to do an optimization with the "hybrid for continuous and 
> discrete variables (VonNeumann)" algorithm which contains the particle 
> swarm optimization and the hooke-jeeves. However, when doing the 
> optimization I get an I/O error 32 (see attached screenshots) and the 
> following:
>
> *_Simulation 21: Caught 'genopt.lang.OptimizerException' with message: 
> File: 
> 'C:\Trnsys17\Optimization\GenOpt\Simulation\tmp-genopt-run-21\GenoptInputFile.LST' 
> does not exist after simulation call.
>
> Simulation working directory : 
> 'C:\Trnsys17\Optimization\GenOpt\Simulation\tmp-genopt-run-21'
> Command string               : 'C:\Trnsys17\Exe\TRNExe.exe 
> "C:\Trnsys17\Optimization\GenOpt\Simulation\tmp-genopt-run-21\GenoptInputFile.DCK" 
> /h /WAIT '
>    Try to evaluate simulation a second time._*
>
> When I close the error the optimization continues again and after 
> doing this two or three times it eventually finds the minimum of the 
> cost function. Does anyone know what this error could be and how to 
> solve it? Otherwise I can't be sure how correct the results are 
> ofcourse. Or could be have to do with the random particles chosen by 
> the algorithm and some of them falling outside the boundaries?
>
> Any help is appreciated. Thanks.
>
> Kind regards,
> Michel
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

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http://www.trnsys.com

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