[QE-users] NaN values for Tc calculations

[Mukhtar Lawal Adam]

I am currently facing an issue in the calculation of Tc of MgB2 using
electron-phonon coupling.
I followed the exercise of Pb done during the 2018 electron phonon school
to my system,
all the calculations went on smoothly with no error, i plotted the phonon
dispersion plot, there is no imagininary freqeuncy.
I tried to calculate Tc but I got NaN values for both omega_log and T_c
values in lambda.out and all values are NaN in alpha2F.dat

 i am puzzled, search all available resources there is no possible
explanations or solution.



Please, if any one has suggestions or has encountered such issue pls guide
me through. Thank you very much.

Mukhtar Lawan Adam
National Synchroton Radiation Lab.,
University of Science and Technology of China.
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