Reason for nstep 1 for NSCF in el-ph coupling calculations

[guptaajg]

Dear Moderators,

Could someone kindly clarify the reason for choosing

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nstep 1

while performing the NSCF calculations for the estimation of electron-phonon coupling parameters?

I saw that similar question was asked recently in the same group but it was left unanswered. I hope someone answers it this time.

Many thanks and best wishes,

Ankit