Try to get unset x,y,

Hello,

I am solving a large sysytem, my idea is to decouple it. But my code can be run in 2D, it gives errors in 3D. It says

Try to get unset x,y, …

Did you see some similar error? Could you give me some insights?

No code to reproduce the error => not possible to help.

generally you have code like

real u;
fespave Vh(Vh,P1); 
Vh uh;
...

u = uh; // here you have big mistake u def by the value of uh at the un set current point

Thank you very much!

Thanks a lot, I see~