It works! In the exec_file line of the protk.dat, replace 'i486_nt' or 'x86e_win64' with the variable $PRO_MACHINE_TYPE. Thanks to Bob (below), and the Exploder. -- George Leonard, Space Systems/Loral T:650-852-5215 F:650-852-7170 Bob Monat wrote: George, In the exec_file line, you should be able to put an environment variable in place of the the machine type. That is, replace i486_nt and x86e_win64 in the path with an environment variable. I remember using something like $(MC) which Pro/E had defined in their startup. Bob This thread is inactive and closed by the PTC Community Management Team. If you would like to provide a reply and re-open this thread, please notify the moderator and reference the thread. You may also use "Start a topic" button to ask a new question. Please be sure to include what version of the PTC product you are using so another community member knowledgeable about your version may be able to assist.