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Sylvia, The output that you sent seems to indicate that you didn't do a make distclean between two build attempts. It's vital that you do a make distclean between every attempt. Are all these compilers in your path? If so, you don't need to specify them in environment variables. I take it from your CFLAGS that you are trying to compile on some 64-bit model? And what does -fPIC do? (From your output: declare -x CFLAGS="-fPIC -m64"). Can we try to build without these options at first, to see if the simplest case works? Try this with the latest beta: make distclean && CPPFLAGS=-DAbsoftUNIXFortran FLIBS=-lU77 ./configure && make test Ed -- Ed Hartnett -- address@hidden