[Pw_forum] Error in Diagnolization

[Nitya Nath]

Dear PwScf Users,

I am getting this error while calculating band structure after scf with 
convergence.

forrtl: severe (174): SIGSEGV, segmentation fault occurred
Image              PC                Routine            Line        Source                                                                                 
pw.x               40000000005D8710  Unknown               Unknown  
Unknown
pw.x               40000000005D8BF0  Unknown               Unknown  
Unknown
pw.x               40000000005F4A40  Unknown               Unknown  
Unknown
pw.x               400000000003C740  Unknown               Unknown  
Unknown

I am using itanium machine with 8GB RAM and I have already tested 
examples.I have also tested for Fe case with FM case. I am using 
16 atoms in my unit cell. Could you please tell me possibility of error?

with best regards.
Nitya