SystemError: <built-in function SystemLinearEquations_UpdateSolutionOntoNodes> returned a result with an exception set

[Cheese-Lvjx]

hi,underworld
I ran into a problem while running my model as follows:

There is no error in my previous code, I also looked up the boundary conditions and the properties of the material, etc., do not know where the reason for this error ......

[julesghub]

Hi @Cheese-Lvjx, not sure what's the problem could be. This function, ln 451, should only copy the solution values back onto the mesh nodes.

What version of Underworld2 are you using? Are you running it in parallel?
Would you be able to share the model, either on this ticket or in a separate github repo. I can investigate more after that.