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? Thanks Dick ___________________________________________________________ Richard Kouzes, Ph.D. Laboratory Fellow FUNDAMENTAL & COMPUTATIONAL SCIENCES DIRECTORATE Pacific Northwest National Laboratory 902 Battelle Boulevard P.O. Box 999, MSIN K7-36 Richland, WA 99352 USA Tel: 509-372-4858 Fax: 509-372-4969 Cell: 509-430-0873 Home: 509-628-0152 rkouzes@xxxxxxx www.pnl.gov webpages.charter.net/rkouzes