[Pw_forum] problem of calculation of phonon

[Zhenyu Li]

Dear PWSCF users

	When doing phonon calculation, I got no problem for some q points, but I got 
the following error for some other q points:
----Cut from out file------------------------------------
     Representation # 23 mode #  23
  IOS =           36

 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     from davcio : error #        21
     i/o error in davcio
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

It's strange that this error only exist for some specific q points. Can anybody
give some suggestion?

Sincerely
Zhenyu