I got auto tune 7 and have sonar x3 studio. It works fine but some times specially when i add some vsts like nexus and stylus RMX when I add an auto tune plugin, it shows just a blank windows instead of plugin. I don't have any issue as long as i am running just the waves i recorded but in some cases when i add some vsts it starts to acting like that.
Anybody had an experience like this?

Hi REZA,
Yep, not only have I seen it, I've replicated it, notified Antares support, narrowed down the cause and the replicated it again in Cubase and Reaper (only in those two DAWs it just causes them to crash instead of showing up with a blank screen).
 
In my case, and I suspect yours as well, it's related to RAM usage. If I add AT7 to any project that uses more than 12 or 13 GB of RAM (this may actually represent a percentage rather than a hard number, so your amount could vary) it will show up with a blank GUI in Sonar (and outright crash my other two hosts).
 
I contacted Antares support on November 11 regarding the problem, got a reply from Victor asking me some basic questions and then have heard nothing despite my additional requests on November 15, November 25 and December 3rd. I've provided them with projects to use to replicate the problem as well as screen shots of the behavior and testing methods. Still nothing.
 
Apologies for throwing a bit of a fit in your thread about it, but it's genuinely been one of the most ridiculous and frustrating support experiences I've had.
 
Shorter answer/solution: use Melodyne and don't buy stuff from Antares. I know I won't.
 
Dean

Thanks Dean for your replay.
So at least i know I'm not alone here :) I can understand how much you got frustrated :) because I had same problem with them on another product "harmonizer engine" and no help . Thats why I didn't bother my self to ask them this time and shared it here :)
Thanks again