bitflipper
I've run into that problem of crashing when I tried to delete a track that had an invalid pointer to a virtual instrument.
IIRC, this was how I got around it: 
1. Re-route the track to a different instrument
2. Save the project and close SONAR
3. Re-open the project, remove the bad instrument via the synth rack
4. Delete the track
 

Slugbaby

eph221
Thank you!  ralf...wish it were different, but you're right.  Why can't we just choose the measures and zap them away.  Am I asking too much? :D:D

I'm sure I used to do this in Sonar Producer 8.5.  Seems a strange ability to remove.