Hi, Victor: Try: FC = {your path}/ifort FCFLAGS = -FR -m32 #this is for 32-bit, use -m64 if you want 64-bit, FFLAGS = -fixed -m32 You may need additional flags depending on your platform (Linux, Sun, etc.). (I have flags for 64-bit Intel Mac: email me at drb at atmos.umd.edu if you need them. Debra Baker University of Maryland