Just wondering.  I got an X3e crash during a load of an Arturia VST 3 synth (Oberheim SEM V) into a simple project that had Battery 3 and Guitar Rig 5.
 
The failure was in Guitar Rig 5.
 
Soooo, I will experiment some more, but am wondering if someone has both Guitar Rig 5 and an additional VST 3 synth they could load in X3e, and see what happens.  (GR 5 loaded first, then VST 3 was attempted to be inserted after).
 
Thanks, I am believing this to be a Native Instruments issue, but thought I would see if happens to others, or if it may be unique to my system.
 
Bob Bone
 

OK - couple of updates.
 
1.  I skipped the load of Guitar Rig 5, and just had Battery 3 in, and it failed in Battery 3 this time on the insert of a VST 3 synth.  I even chose a different synth this time.
 
2.  I then started a new Normal project, with nothing in it, and it still failed on insert of a VST 3 synth.
 
So, I will keep digging.
 
Bob Bone
 

Could not replicate, projects did not crash using the following steps:
Create new project
Add audio track
Add Guitar Rig 5 in FX bin
Insert Fabfilter Twin 2 VST3
or
same steps except inserting iZotope Iris VST3 instead of FabFilter Twin 2
 
still running Win7 though.

Got you - Might be an Arturia thing.  I just loaded MDrummer (different vendor), which is a VST 3, and had no problem.
 
I could have sworn I created a project in X3 when I bought the Arturia V Collection in January, and I loaded each synth into the project to make sure they all loaded.  I didn't save it, and it is possible I did it in X2, OR possible prior to applying X3e.  I just cannot recall.
 
Bob Bone
 

Hi Bob, 
Just tried it with a new project and got a crash. 
Audio track with gr5 on it and inserted oberheim vst3. Crash. *frownyface*
 

I expect you will find it will crash on an empty project and an insert of an Arturia VST 3.
 
Bob Bone
 

there were previous issue(s) with arturia vst3 iirc? e.g.,
http://forum.cakewalk.com/Trouble-with-VST3-Plugins-from-Arturia-and-uhe-m2904549.aspx
http://forum.cakewalk.com/Bass-station-and-Arturia-VST-not-working-in-Sonar-X3e-m3035009.aspx
did you get nay response from the bug reports? hth

I think there is is something screwy with some of the Arturia synths. Before I went away I got a couple of Sonar crashes, the first time for ages. In both instances an Arturia synth was in the project. Then I had the same error message when one of their synths crashed in stand alone.
 
I am no where near my DAW for the next week so cannot investigate further. I can't even remember if I am using the VST3 versions
 

I looked at the 2 links in the other above post, and see that I had already confirmed earlier that there was an issue with Arturia - I must be getting old, because I have zero recollection of posting that.
 
Yikes!
 
It may well be some Sonar quirk, as I am able to load the same synths that fail in Sonar into Forte (a VST performance host from Brainspawn), and they all load there just fine.
 
Bob Bone
 

What is the status of your forgotten bug report?