I posted over in the X1 threads about this. Looking for some help with an issue.
     I have been using Amplitube 3 Free ever since it became available. This morning I tried to insert it into an fx bin and I got this error:   VPA PLUGIN HAS REJECTED VPA HOST!
     I never had this problem before. I am wondering if I have a conflict issue. I bought Notion 3 a while back from the Cakewalk store. It had a version of X-Gear Amplitube which I installed for use in Notion 3. The Vst .dll file for that is in the same folder with Free. I am wondering if there is an issue with them conflicting now. X-Gear loads everytime with no problem. No luck with Free. Although, the stand-alone version of Free opens right up.
     Can anyone help,please. I never had a problem with them both working before. Any suggestions would be welcome.

I've never seen that error, but the first thing I would try is uninstall/reinstall Amp Free, and don't forget to run a VST scan in Sonar afterwards. If you still get the error, remove the X-Gear DLL file from your VST folder temporarily to see if it's the culprit (and run VST scan again).

Thanks so much. I did finally end up uninstalling both. I went to the Free site and downloaded the latest version and installed it. So far everything is running fine. I am kind of leary about re-installing X-gear though.
     Thanks again for your help.

Glad you got it working again. X-Gear's modeling predates AmpliTube 3, so if you have to choose one over the other you're better off with Amp Free.

AmpliTube 3 FREE replaced X-Gear so no need to worry about installing it at all now.

Thanks for all the responses. And BTW, IK Obi, the re-install of Free was like butter. It even loaded my other amp sims from Guitar Shop. I never had an install go so smoothly. Thumbs up for a great product! Thanks again, all of you.

Thanks! Glad you're liking the new AmpliTube Custom Shop!