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help! error about bandgap_photonic_crystal model.

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Hello All?

when run the bandgap_photonic_crystal example in RF model,the following error maybe appear at times.


Error:
Failed to find a solution for all parameters,
even when using the minimum parameter step.
Maximum number of Newton iterations reached.
Not all parameter steps returned.



Warning: New constraint force nodes detected: these are not stored !
25 1e-005 1.0000000 1.5e-005 126 111 229

total waring 115


And the Hz is in red color in physics> scaler variable. I think this is the place of key problem. Who know why
Thank you in advance.

Yaohui Zhan


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