Pro Tools has a tendancy to crash with a type 2 error while bouncing to disk while pushing performance with RTAS plugins
steps
1) create a 32 track session
2) put some audio on the tracks
3) option-assign RTAS mono compressors across all tracks.
4) on the 2nd insert, assign as many D-verbs as you can without getting 9128.
try to bounce to disk.
I got a type 2 while hitting cmd period once.
The 2nd time I got a type 2 after a 9128 error flickered on the screen for a second.