Well I made a mistake and install version 5.0 onto an XP Pro SP3 machine. It appears I can open existing 5.0 applications but not the older 4.0 applications. Trying to be clever I open the 4.0 application in another machine with View Studio 5.0/XP SP2 installed and export/archive the application thinking that it is now a good 5.0 application. I then deleted the existing application in the SP3 machine and restore the new 5.0 application. For whatever reason, this didn't work either. The problem I'm running into is that if I open any graphic screen, View Studio would hang for about 5 seconds and then crash. I don't have any problem viewing RSLinx Enterprise, parameters, alarms configurations. Any ideas beside uninstalling or waiting for updates that will support SP3?