I'm having a weird error when trying to solve an Allen-Cahn (time-dependent) problem.
If I run the code: "python allencahn.py" fresh, then it works. But if I run it immediately again, I get these kinds of errors:
"Setup and Factorization: PARDISO returned error -3!"
and
wrote matrix to file 'pardiso.err', please check
Newton iteration 3 energy = 3.4219400589865796e-08 Traceback (most recent call last):
File "allencahn.py", line 100, in <module>
SolveNonlinearMinProblem(a,gfy)
File "C:\FILES\NGsolve_code\AllenCahn\../Newton_Methods\nonlinear_min_funcs.py", line 18, in SolveNonlinearMinProblem
inv = a.mat.Inverse(FES.FreeDofs())
netgen.libngpy._meshing.NgException: PardisoInverse: Setup and Factorization failed.
sometimes if I delete the "__pycache__" sub-dir, it will run successfully again (but not always). Also, if I just keep trying to run "python allencahn.py" at the command prompt, eventually it will work.
This is on a windows machine.
