Dear RegCMers I'am trying without success to run RegCM3 in parallel mode with 2 procesors. I use Intel Fortran and I have installed openmpi but when I write "mpirun -np 2 ./regcm" I receive the following error: forrtl: severe (24): end-of-file during read, unit -4, file stdin Image              PC        Routine            Line        Source             regcm              081D3D7D  Unknown               Unknown  Unknown regcm              081D32F5  Unknown               Unknown  Unknown regcm              08195BA8  Unknown               Unknown  Unknown regcm              08155903  Unknown               Unknown  Unknown regcm              08155260  Unknown               Unknown  Unknown regcm              08171D24  Unknown               Unknown  Unknown regcm              080DDCAF  Unknown               Unknown  Unknown regcm              08118866  Unknown               Unknown  Unknown regcm              08049D21  Unknown               Unknown  Unknown libc.so.6          B7D6B5C5  Unknown               Unknown  Unknown regcm              08049C31  Unknown               Unknown  Unknown can you help me fix this error? is the command I whote sutable for openmpi? my makefile is: #  Makefile for RegCM@ FFLAGS = -fpe3 -tpp7 -cm -w -w90 -w95 -convert big_endian FC = ifort LD = $(FC) SRC = \ aermix.f ... OBJ = \ aermix.o ... all: regcm regcm:    $(OBJ)     $(LD) -o $@ $(FFLAGS) $(OBJ) -Vaxlib clean:     rm -f $(OBJ) regcm *.o Must I make changes in makefile? if yes how please? I thank you very much for help Cordially Sassi