So I used Bias Amp 2 in a project successfully. When coming back to the project and reopening it Sonar crashes upon trying to startup. I recreated the same issue in a test then found that I was able to open these projects once I uninstalled Bias Amp 2. Gonna contact Positive Grid and see what they say.

It works fine for me in Studio One and REAPER, I have not tried it in SONAR as I haven't really used SONAR in the last 2 1/2 years. I'll give it a try latter today and let you know.

Works for me.

Exactly the same problem here.  Any word from Positive Grid?

Just got around to trying BIAS Amp 2 in SONAR just now (completely forgot about it), I get the same crash on loading the project again. Latest version of SONAR Platinum. Works fine in Studio One and REAPER. Read a post on another forum where someone was having trouble with SONAR and a PG product, they apparently contacted PG support and as SONAR is dead and no longer being updated or developed it didn't look good for a solution forthcoming.
 
 

I have the same problem with bias amp 2 demo. the 64 bit locks up.I tried the 32 bit version and that works when reopening the project.
Was wondering if anyone had a fix for the 64 bit in sonar platinum?

I have the same experience. Took me a while to get Sonar to see the 32-bit vst, I had to exclude the location of the 64-bit DLL. 

I am pleased to say, they fixed the crashing on launch problem in Version: 2.1.0.870 of Bias Amp 2