Initially, I ran NSCF without using wf_collect, since the Quantum Espresso input file description says, "wf_collect is obsolete". Without it, my NSCF terminated smoothly and quickly. However when I used this NSCF data to run my PDOS, it showed an error saying, "Error in routine projwfc (1): pw.x run with a different number of procs/pools. Use wf_collect = .true." I haven't made any changes in my NSCF file, except for adding wf_collect = .true. Not only its taking quite long, but it is showing a lot of "c_bands.....eigenvalues not converged" lines now. What could be the possible reason? I have attached the necessary files here for reference. I shall be glad to receive some valuable suggestions. Thank you.