How to solve the problem "Error in routine prtmob (1): The carrier density is 0"

General
1

I tried to calculate the transport of YN, but i see the problem in epw2.out. The calculation shows the Elec mobility for 202020 fine grid, but as soon as I make the fine grid 303030, this following error is coming.

\

BTE in the self-energy relaxation time approximation (SERTA)

=============================================================================================
Temp Fermi Elec density Population SR Elec mobility
[K] [eV] [cm^-3] [e per cell] [cm^2/Vs]



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Error in routine prtmob (1):
The carrier density is 0
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

stopping …

2

Hi,

You need to delete the restart files (restart.fmt, F*) present in your directory when you change the fine-grid of your calculation.

Best regards,
Sabya.