Access Violation - no RTTI data!

One of my users is getting the following error when opening a specific project in Toon Boom Story Board 3D. “Fatal Error - Access Violation - no RTTI data!” It only seems to be an error with that project specifically, on all machines. All other projects open fine on his machine and others.We are running Toon Boom Story Board 3D Version 9.5.0 (6864) (2011-09-12 15:56:39)Any help would be greatly appreciated.