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failed to evaluate variable jacobian

Posted Apr 26, 2011, 1:05 p.m. EDT 2 Replies

John Pradeep
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Hi, I am using piezomodule in comsol 4.0a. When performing time domain analysis the above error is being popped. Please help in fixing the problem.
Regards,
John
2 Replies Last Post Jul 1, 2011, 1:47 a.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Apr 26, 2011, 2:24 p.m. EDT
Hi

there are several possibilities, either missing BC's or more probable in v4.0, the solver sequence is not always updated correctly on the fly, if you change your model and solvers during work, in V4 I noticed that you often need to DELETE the solver sequence fully and regenerate a fresh new one, only annoying thing, you loose also all the Results settings.

This is fixed, or at least far better controlled, in V4.1

--
Good luck
Ivar
Hi there are several possibilities, either missing BC's or more probable in v4.0, the solver sequence is not always updated correctly on the fly, if you change your model and solvers during work, in V4 I noticed that you often need to DELETE the solver sequence fully and regenerate a fresh new one, only annoying thing, you loose also all the Results settings. This is fixed, or at least far better controlled, in V4.1 -- Good luck Ivar
comsol newbie
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Posted: 1 decade ago Jul 1, 2011, 1:47 a.m. EDT
So, that means each time you change a setting somewhere you have to go and delete the previous one? I am using v3.4. How do you delete the previous settings?
So, that means each time you change a setting somewhere you have to go and delete the previous one? I am using v3.4. How do you delete the previous settings?

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