Crash occurs because the methods called in the destructor of ToFUtil try to access the IRenderWindowPart via this->GetRenderWindowPart(). Needs to be examined in detail.

ExtApp can now (with Master-Update from today) not even be started anymore. Crash at line 101 in QmitkToFUtilView.cpp

[c9f81d]: Merge branch 'bug-12803-CrashOfExtAppWhenToFUtilIsEnabled'

Merged commits:

2012-08-23 12:08:23 Alexander Seitel [748148]
Initalize PointSetWidget in Activated

2012-08-23 12:07:51 Alexander Seitel [46c1ff]
Check if foreground renderer are already defined

[3b85da]: Merge branch 'bug-12803-CrashOfExtAppWhenToFUtilIsEnabled'

Merged commits:

2012-08-23 15:08:51 Alexander Seitel [ea2e29]
Moved function calls from Destructor to Deactivated method.

Bug should be fixed now. Perhaps you can also try with your configuration.

On my windows computer it now works. No crashes anymore.