If you try to activate your license of Autodesk 3ds max 2008 after the date of December 31, 2008, you may get an error message "Your license has expired". The only way to solve this is through manual activation with the help of an Autodesk customer service, you can message them through their forums. Activation error codes ; “Activation limit reached for [product]. This serial number has already been activated on 2 computers.” -or-. “Maximum.