Learning Forum

[marceau.nouvellon]

At the end of a 3D simulation with lumerical heat solver --> The program terminated due to an error: Heat Flow solver encountered an unexpected numeric error after 0 iterations  ( detail: linear system solver error 3 ). I cannot find what the detail message refer to ...

[Guilin Sun]

Could you first test without heat source? it is hard to diagnosis with such error message. You may try to check if the meshing works fine; heat source power is too high from zero; or time step size is too large etc.

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Since HEAT solver is linear, usually it will work as long as the meshing is proper.