>"install MPASM" ? i just have the mpasm.exe file which i use PDE needs a "PIF" file (Win3.1) or a shortcut (Win95) to run another app. That's exactly right what you did. Good sleuthing. Andy ================================================================== Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865 Hardware & Software for Industry & R/C Hobbies "Go fast, turn right, and keep the wet side down!" ==================================================================