I have Cubase 6.0.7 and the NI Komplete package which has Guitar Rig 4 in it. Previously I had Guitar Rig 3 there. 3 works in Cubase 6, but 4 just hangs the session if you try and insert it on an audio track. I’ve updated the 4 to the latest version in the NI Service centre and can’t find anything on the NI forums - I was wondering if anyone from the Cubase side had had issues with this and found a solution?
I am currently on C6.5 and Komplete 8 (Guitar Rig 5). But not long ago I had Komplete 6 (GR 4) with C6 working well. So, I am fairly certain it should work. Not sure why it doesn’t work for you. Maybe try hiding all the other plugins temporarily or checking the blacklist.
HTH
J.L.
There, I suspect, lies your problem. GR4 64-bit works here with no problems whatsoever in C6.5.3 64-bit on Win7x64. I no longer have any 32-bit versions of anything (just lucky there are 64-bit versions of everything I need now!).