LS, I have the ASPIC_Fix program in its default location. My ASM files are on the external drive called M: If i execute the command in a DOS box i get a error. The commandline equals C:\embedinc\com>aspic_fix -IN "M:DCC4Turn_001.asm" -OUT "M:DCC4Turn_002.asm" File not found. File name was "M:DCC4Turn_001.asm" with suffix string "". *** Program aborted on error. *** C:\embedinc\com> Going to the M: drive and executing the command there gives the same result. Any help is welcome, Harry -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist