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try/catch in matlab for COMSOL

Posted 16.11.2012, 01:05 GMT-5 Version 4.0, Version 4.0a, Version 4.1, Version 4.2, Version 4.2a, Version 4.3, Version 4.3a, Version 4.3b, Version 4.4, Version 5.0, Version 5.1, Version 5.2, Version 5.2a 2 Replies

Alexander Warning
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I am doing a parametric sweep in COMSOL with the geometry. The problem is, it is a large parameter space and a few combinations which would be unreasonable to check give an error. It is a stationary solver and what I need is something in COMSOL matlab code to tell me if there is inverted geometry or too many iterations such that I can skip that set of parametric values. I get the error:

For example, can I have COMSOL output the iterations as it solves such that if it hits a certain amount, I can quickly tell if I need to skip that set of parameters. This is inside a huge FOR loop as I need to sweep over a very large parametric space.

"??? Java exception occurred:
Exception:
com.comsol.util.exceptions.FlException: Failed to
find a solution for the initial parameter
(rethrown as
com.comsol.util.exceptions.FlException)
(rethrown as
com.comsol.util.exceptions.FlException)
Messages:
The following feature has encountered a problem

The following feature has encountered a problem

Failed to find a solution for the initial
parameter

Maximum number of Newton iterations reached

Returned solution is not converged
- Feature: Stationary Solver 1 (sol1/s1)
- Error: Failed to find a solution for the
initial parameter."
2 Replies Last Post 01.02.2013, 20:23 GMT-5
COMSOL Moderator

Hello Alexander Warning

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

Pierre-Yves Prodhomme
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Posted: 1 decade ago 01.02.2013, 05:35 GMT-5
I don't know if you got an answer to your post.
I am stuck with a similar problem.
With a stationnary solver I would like COMSOL to calculate all the parameters even when he didn't converge for one particular parameter. For the moment when COMSOL is not able to converge for a parameter it just stops as you said. This is bothering. I am sure there is a solution but I cannot find it...
Any help would be appreciated.
Thanks in advance.
I don't know if you got an answer to your post. I am stuck with a similar problem. With a stationnary solver I would like COMSOL to calculate all the parameters even when he didn't converge for one particular parameter. For the moment when COMSOL is not able to converge for a parameter it just stops as you said. This is bothering. I am sure there is a solution but I cannot find it... Any help would be appreciated. Thanks in advance.
Alexander Kuznetsov
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Posted: 1 decade ago 01.02.2013, 20:23 GMT-5
Check for "stop condition" in the help. It's explained pretty well there.
Check for "stop condition" in the help. It's explained pretty well there.

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