[TRNSYS-users] invalid floating point operation

[Marie-Hélène]

Hi Sabrine,

I got this issue recently. This error was happening in a custom type that
someone gave me. This type was working well in TRNSYS 17, but I had this
error in TRNSYS 18.

First of all, I made sure I had no division by zero. So no input with a
zero value.

I was still getting the same error, but it was happening later in the
simulation.

Then, I used the debug mode with Microsoft Visual Studio and the Fortran
Compiler. I found out that a few value (x)  were getting bigger through the
simulation until exp(x) wasn't possible anymore (maximum value of the
computer was then outmatch).

I fixed those bugs and now it works fine.

Hope this can help somehow,

*Marie-Hélène Talbot* | Étudiante à la maîtrise
Énergies renouvelables et efficacité énergétique
Département de génie de la construction
École de technologie supérieure


2018-01-25 3:26 GMT-05:00 <trnsys-users at lists.onebuilding.org>:

> Dear TRNSYS users and developers,
>
>
>
> Does anyone have an idea how to deal with "invalid floating point
> operation"
>
> messages during simulation ?
>
>
>
> Thanks in advance,
>
>
>
>
>
> *Sabrine ZADI*
> Ingénieur Efficacité Energétique
> Service Engagement Energétique - Direction Ingénierie Conception
> *sabrine.zadi at engie.com <sabrine.zadi at engie.com>*
> T 02 40 41 33 28
>
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