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Transient electromagnetic analysis : ***ERROR: System Error in NLBH evaluation

Transient electromagnetic analysis : ***ERROR: System Error in NLBH evaluation

Transient electromagnetic analysis : ***ERROR: System Error in NLBH evaluation

(OP)
Hello!

I'm using non-linear B-H curves in my transient electromagnetic analysis. Does anyone know what causes the following error message and how it can be resolved?
***ERROR: System Error in NLBH evaluation

In my case it only occurs at frequencies above ~5000 Hz and so far I can only resolve it by using an extremely small incrementation, which is many orders of magnitude smaller than the period of the transient problem.
The error also occurs when I reduce the B-H curve data to two data points (for testing).

Thank you!

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