On DOS SW if you lack proper tags for i.e. drivable Sector Object, you will get a more graceful exit with the error `Forgot to tag outer loop for Sector Object #5` Easy way to recreate this is to open `example.map` - Navigate to E-F and deleting the ST1 marked `541,0,2` (Bottom right one) VoidSW Crashes to desktop silently with no error in the logfiles (even on debug). Expected outcome: Exit with an error, i.e. dialogue box