Yesterday when I tried to start Mindstorm RIS (RCX software) on a Windows XP system after reinstalling RIS to the PC, I got the following message on a "dialog box" - "A critical error has occurred. You may be running out of memory, or you may need to reinstall Robotics Invention System 2.0" Does anyone know how to resolve the problem? Jin -- To UNSUBSCRIBE or CHANGE your settings, please visit https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list". -- VADCFLL administrative announcements are sent via VADCFLL-ADMIN-L. Visit https://listserv.jmu.edu/archives/vadcfll-admin-l.html to subscribe.