How would sonar know what's 'unwanted'?

@lawp: Well, if it kills the VST, then I would consider it "unwanted" ;-)
All the other 3rd party VSTs were not affected at all, so I guess they must have some sort of fail-safe mechanism, which X3 doesn't have.
@Bob: Thnx, you too :-)
 

The issue is not X3, it is the sfz engine synths bundled with X3. The synths could have been designed to ignore the data or throw a dialog indicating unrecognized/unexpected data in the track, instead the synths go silent. It has been this way ever since the inventor of sfz developed the first sfz engine synth for Cakewalk.

Ah. Thanx for clarifying. In that case I would wish for the future, that the engine would give a dialog to delete undesired data in an automated process. Would save some time, I guess. 

I wonder if it is worth writing a quick CAL script to delete all RPN/NRPN data in a midi track.  It seems easy enough to do.
 
Bob Bone
 

CAL would work for now. The CAL free way would be to create a preset for the MIDI Event Filter MFX and "Process Effect" or just add the plug-in to the MIDI track.

@Bob
Could you do that?
I would wash and kiss your feet (metaphorically speaking) if you would do and share that...
;-)

@scook
Doesn't work. Even if I filter everything but the notes, sfz will mute the instrument.
 
 

Any chance of uploading the MIDI file or project somewhere?

I already uploaded it, but I cannot post any Urls... wait a second, maybe I can trick the forumscript ;-)