OpenController crashes and the error 'MainCtrl caused an exception and has been closed' appears

Tech Note: TN0197
Product: OpenController
Version: All
Date Added: 2005-09-22

Issue

When opening an OpenEx project, an error appears stating, "MainCtrl caused an exception and has been closed." The project opens but the controller is 'grayed out' and can no longer be accessed. OpenEx clients can crash for several reasons, but one issue that will always cause controller to crash is when a percent sign (%) is used as a label in a graphic frame.

Workaround

Once controller has crashed, it is not possible to access that controller again. The controller will need to be rebuilt and the % sign must be omitted to prevent future crashes.