Fellow g77 Users, In Windows, via VMWare from Linux, I have a Fortran90 program that I have been able to compile, link, execute and build a .dll file using the Compaq Visual Fortran Development Environment. In Linux, I am attempting to compile this same program using the following g77 command and options: g77 -ff90 -ffree-form -fcase-preserve apm_mod.for This g77 command fails to recognize the Fortran90 module, real, integer and logical statements. Has anyone tried compiling Compaq Visual Fortran90 programs (or something similar) using the g77 command? Any help would be appreciated. Thanks, Clifton Bowyer