Dear Sir,

While doing a calculation with Si bulk, I made "occupation" to be a "fixed" in my ground state calculation. I understood that this actually removes the "Warning: Metallic System" note that comes after the yambo calculation. However, when I progress further with this for the qp electron-phonon calculations using elph_qp, the non-zero temperature suffers NAN error.

This however does not come when I change "fixed" to "guassian" with a suitable "degauss"!.

Where I am doing wrong, if you can tell me please...

With regards

Sitangshu