I am facing problems in transient simulation of a simple PN junction diode. When I simulated the device using version 4.6.590, everything works fine. However, when I do with the latest version (5.1.871) I get following error.
“C:\Program Files\Microsoft MPI\Bin\mpiexec.exe” -n 1 “C:\Program Files\Lumerical\DEVICE\bin\device-engine-msmpi.exe” “C:/Users/admin/Desktop/DEVICE Exp/Exp1.ldev”
admin-HP(process 0): The program terminated due to an error: Convergence failed and minimum time step reached.
admin-HP(process 0): Error: there was an unknown parallel error. The error code is 9002, the process number is 0"
I have tried to reduce the minimum time step to as low as 200fs and abs lte limit as high as 0.05 but the problem persists. I also reduced the step voltage to 0.1V only but in vain. On the other hand, the same simulation works fine even with 500fs time step, 0.001 abs lte limit, 1.0V voltage step, and much coarse mesh on the older version of DEVICE (4.6.590).
Thanks in advance.