EPW Forum

Dear EPW developers,

I just started using EPW with qe 7.0 to compute electron-phonon coupling and hence scattering for 2D materials. For learning, I started with the given mgb2 example in the EPW package.
After computing phonon and preparing SAVE folder I ran scf and nscf on epw folder. Then on executing epw.x I am getting an error;

Parallel version (MPI), running on 8 processors
MPI processes distributed on 1 nodes
K-points division: npool = 8
85678 MiB available memory on the printing compute node when the environment starts

Waiting for input...
Reading input from standard input

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Error in routine epw_readin (1):
Bad line in namelist &inputepw': " kmaps = .false." (error could be in the previous line)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


Even I haven't changed the epw.in the file given in the example folder of mgb2.

Kindly suggest me.

Thank You

Regards
Sumit Kukreti
Ph.D. Scholar
Indian Institute of Technology Jodhpur
INDIA

Dear Sumit Kukreti:

Starting from EPW v5.4, the input keyword of kmaps is removed: https://docs.epw-code.org/doc/Releases.html#epw-v5-4
So you need to remove kmaps in your epw.in .

PS) I confirmed this change was already made in the mgb2 example folder (EPW/examples/mgb2/epw) starting from QE v6.8 including EPW v5.4 .

Sincerely,

H. Lee