I've never used the g77 compiler before. I have a program that I can compile with absoft fortran. I need to compile with g77 on a linux system. I can't figure out how to get the exe. I tried f77 -O band1105.f and get an a.out file I tried f77 -o band.exe band1105.f and get band.exe but it doesn't run. Help! What are the command lines I need to generate an executable? Thanks. Sorry for my stupidity. Kandy S. Jarvis ESCG/Hamilton Sundstrand P.O. Box 58447 Houston, TX 77258-8447 Attn: Kandy Jarvis, MC: JE104 281-483-5165/281-483-0817 Fax 281-244-5031