[Pw_forum] using *_extrapolation in pw

[Sergey Lisenkov]

 Dear all,

  I noticed that when I use wfc(pot)_extrapolation='second_order' (according to tutorial, it should speed up calculations) in pwscf, job (in parallel) hangs somewhere in scf calculations, if I disable it (corresponds to 'none'), there are no such problems. Has anybody encountered such behavior? I am using pgi-7.0.2 on cray xd1, acml, -D__XD1 flag.

 Sergey