Ventana software support forum

Hi

I would like to limit the number of simulation say to 10 when optimizing. How to do it?

I join the .voc file that I use. it generally stops the simulation after appoximately 20 simulations. Generally it congerges enough already at 1O. Making multiple optimizations controlled by VBA
I need tio reduce the optimization time.

Best regards.

JJ

Can you upload the VOC file?

Sorry I forgot to upload the file.

I upload the file with a mdl extension because the voc is not allowed.

Regards.

JJ

I upload the file with a mdl extension because the voc is not allowed.

That is a bit unfortunate admittedly but I found you can always upload a zip-archive which might also be a good idea in itself?

Regards,
Guido

Hi JJ,

I see that you are using the optimization control option I fail to locate this in the reference manual - would you have a link here?

Regards,
Guido

Hi Guido

I found easier to change the extension to mdl than zipping the file.

About the max_sims, I did not find either a reference in the Vensim manuals.

Regards.

JJ

I'll have to take a look at the code - I suspect that the limit only gets checked between passes, not at every single iteration, in order to avoid a lot of if-then testing when normally not needed.

LAUJJL wrote:I found easier to change the extension to mdl than zipping the file.

I've changed the forum to allow this now.

About the max_sims, I did not find either a reference in the Vensim manuals.

Does it stop ok if you make MAX SIMS 20?

There's a funny (weird, not ha ha) quirk in the code, in that max sim values <= 10 are ignored. So, if you set it to 11, it should work. You could also try lowering the PASS LIMIT to 1.

Hi Tom

Thank you for the information about the max_sims. I will experiment if that works.

Regards.

JJ

I changed the lower limit, so that any nonzero value of SIMS_MAX is recognized. Version 6.3a (soon) will incorporate that.