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Errors "JavaNullPointer" when inputting matrix with multigrid preconditioner
Posted 11.07.2019, 02:22 GMT-4 Low-Frequency Electromagnetics, LiveLink for MATLAB Version 5.3 1 Reply
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Hi everyone, I'm using Livelink(TM) for Matlab(R). When I tried to run the solution after inputting matrix to an electrostatic model's stationary solver, the error came out with "java.lang.NullPointerException" and the server flashes and disappeared. I've checked a few settings and found that it was probably about the multigrid preconditioner. I think the InputMatrix node cannot work well if the stationary solver uses multigrid preconditioner. But why? Can anyone tell me? How can I solve this problem?
The picture below is the example commands I use. Maybe help understand.
So much thanks
Fei
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Hi,
I just did quick test and couldn't repeat the error, but without your model it isn't really conclusive. I recommend that you update COMSOL to the newest version and if that doesn't change anything contact Support.
Best Regards, Jesper Been COMSOL