When I set the stimtype = 0，then there make a mistake:
L3 : parabolic solver (PT) diverged.
CG Error: Bad preconditioning !!
It can be normally calculated when the stimulus type is 1, but no matter how intense the stimulus intensity is, the result is almost unchanged, which is about -86mV.
In addition, I found some raised burrs in the mesh of my model, I wonder if it is related to this reason.
Sincerely thank you for your help!