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Error 9028: Expression could not be evaluated...

Posted 1 avr. 2010, 16:12 UTC−4 2 Replies

David Tamburello
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I am attempting to run a model with multiple species diffusion as well as heat transfer and keep getting an Error 9028: Expression could not be evaluated.

I have removed all expressions definitions from the model and only have the constants remaining... any thoughts as to what may be causing this error or how I can "debug" the error to find the problem.

Thank you for your time,
David
2 Replies Last Post 1 avr. 2010, 16:58 UTC−4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 1 avr. 2010, 16:48 UTC−4
Hi

normally you should get a little more info, such as a name or a full expression where the error appear, then it's to find out where it is used.
It could be a variable name or a boundary condition with an expression or a mistyped variable. These are sometimes tedious to identify

Good luck
Ivar
Hi normally you should get a little more info, such as a name or a full expression where the error appear, then it's to find out where it is used. It could be a variable name or a boundary condition with an expression or a mistyped variable. These are sometimes tedious to identify Good luck Ivar
David Tamburello
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Posted: 1 decade ago 1 avr. 2010, 16:58 UTC−4
One of the other engineers looked it over and found the issue. Apparently, there was an undefined term used for the time step... which is actually rather odd considering I never set anything for the time step.

But, regardless, the term was removed and the model is now running.

Thank you for your assistance,
David
One of the other engineers looked it over and found the issue. Apparently, there was an undefined term used for the time step... which is actually rather odd considering I never set anything for the time step. But, regardless, the term was removed and the model is now running. Thank you for your assistance, David

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