Exception Type: Nil Object Exception

1: Sub MainWindow.MainWindow.UpdateVisibility( MainWindow.MainWindow, PlanObject, boolean )
2: Sub MainWindow.MainWindow.UpdateVisibility( MainWindow.MainWindow, int32 )
3: Sub VisibilityThread.Event_Run()


User description of above error trace:

Attempting to convert AP V1 to V2


User description of above error trace:

Opening previous "New File" from v1.6. "Recalculating" sign appeared then this error log.


User description of above error trace:

I was trying to open my one and only existing V1 plan after running the conversion program. Nothing fancy. It's the very first thing I tried to do with V2.