Hello, madam/sir It seems that "-mcmodel=medium" is not supported by mpif90 (I installed the latest mpich). How could I use large array? mpif90 mtestf90.f90 winfencef90.f90 -o abc -assume byterecl -shared-intel -mcmodel=large -fPIC %% The output is ./abc: symbol lookup error: ./abc: undefined symbol: __intel_new_feature_proc_init ./abc: symbol lookup error: ./abc: undefined symbol: __intel_new_feature_proc_init =================================================================================== = BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES = PID 27182 RUNNING AT lgmiris = EXIT CODE: 127 = CLEANING UP REMAINING PROCESSES = YOU CAN IGNORE THE BELOW CLEANUP MESSAGES =================================================================================== Best Regards Weiguang HE