"Kouzes, Richard T" <RKouzes@xxxxxxxx> writes: > I am new to this, and want to get gfortran running on my Mac. I downloaded and installed gfortran-4.6.1-i686-SnowLeopard > When I run it in a terminal window by typing "gfortran hello.f" on a small file I created, I get: > gfortran: error trying to exec 'as': execvp: No such file or directory > > Can you suggest what I am doing wrong? You need to install the assembler, which is not part of the gfortran package. On a Mac I believe you can do this by installing XCode. Ian