Thanks Jim.

I'm trying to open BIAB sgu in RB. What happens is that it generates the instrument files then says it's generating the drums. Next I get the exception and then it hangs and the drums never get generated.

Strangely this all started the other day when I was working on a song already open within RB and just tried to add a RT drums shaker.

Now I have the access violation when I open a BIAB sgu with a song that has a Real drums washboard. All the other instruments load but not the washboard RT - it just hangs forever after I get the exception. So it's something to do with these RT drums (I'm thinking).

I run the both instruments and drums off the usb hd.