Re: run time error

[Michaël Kummert <kummert@xxxxxxxxxxxxx>]

Juan,

> I am optimizing 7 variables of a thermosyphon solar system and during 
> some iteration I get a run time error as shown in the figure attached. 
> It appears as though a square root of a negative number is trying to be 
> calculated.  The input values that are being optimized are lower and 
> upper bound, so that irrational values are not simulated. I haven’t 
> recompiled trnlib.dll. The only thing I did was install the 
> trnsys_15_3_00_p01.exe patch. I would like to know if this occurrence is 
> inevitable or if there is anything I can do to avoid it.

I assume that you are only getting that error for some configuration of 
the parameters. You could use a TRACE command in that configuration to 
find out if any outputs are getting strange values.
If you have a compiler, you could also try to find out where the math 
error occurs.
If you cannot solve the problem and if you are sure it does not come 
from unacceptable parameters, you can send your project to your 
distributor for additional support.

Kind regards,

Michaël Kummert

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_________________________________________________________

Michaël Kummert

Solar Energy Laboratory - University of Wisconsin-Madison
1303 Engr Res Bldg, 1500 Engineering Drive
Madison, WI 53706

Tel: +1 (608) 263-1589
Fax: +1 (608) 262-8464
E-mail: kummert@xxxxxxxxxxxxx

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TRNSYS Web Site: http://sel.me.wisc.edu/trnsys