Dear All, I wish to run QE on REDHAT OS with: ifort 11.1.072, mkl -- 11.1.07, and Intel MPI 4.0, I faced withe the folloeing error: SIGSEGV, segmentation fault occurred, libmkl_mc.so 00002ADA8953633E Unknown I did search in forum but non of them work . Any suggesion regards Fariba Nazari Iasbs