Trying to install a 30 day trial of Autodesk Inventor 9. (Awaiting my own copy)
Inventor 9 was first installed with release 8 left on the machine. When i tried to create a new sketch, assembly, drawing etc. the following error occurs "Handle is invalid!" and no sketch panel appears.
Anyone have any ideas on how to overcome this problem. Have now uninstalled Inventor 8 too.