Is AA3 not compatible with all VST plugins?

Question

Or am i the only one that saves a setting in the master rack (effects rack) and to go re-call it later, a plugin or 2 will be missing from the chain and adobe audition says "One or more of the transforms in this preset could not be opened"
This includes Sonars Sonitus FX (all of them), all of The antress modern plugins and even some Waves plugins, the only ones adobe seems to like are the crappy free vsts and of course all of the adobe plugins. And some of the antress modern plugins will cause aa3 to crash when i try to select them, only certain ones, why is this? does anyone else have problems with vsts and dx fx in aa3? and for the majority to clear things up, most of my plugins load in the rack, but when i save the session and go back to open it the effect is gone (im not sure if this holds true while the track is frozen then i think adobe audition gives an error message like "an error occured while trying to load the plugin xxxxxx"
any ideas?

Answer 1

I've never had the problem - and judging from the stunning lack of replies, nor has anybody else. Doesn't mean it's not real - just that nobody else here recognises it.
I would say though that Audition is a bit picky about VST plugins, and generally only works with ones that have been correctly coded (by no means all of them). The others (and this is generally the free ones) have been known to screw up big time. Last time I heard, Waves plugins worked fine. As for presets not being saved, you have to be a bit careful to make sure that you've saved them in the appropriate place; with a lot of plugins they can store their own, and there's a good chance that Audition won't be having any of that when you reopen the session - you have to store them as a set of values in Audition that it can send to the VST to have any chance of working at all, as far as I'm aware.