Hi Andrew
More progress, I made that alteration in CB as you suggested and I was able to drag the tracks in one by one without causing a freeze or crash. However when I followed through and tried it again this time with the complete mix on the blue button I did get a freeze which I had to close CB to get out of (couldn't just use Task Manager).

I am now going to try finding the CB upgrade to 9.0.40.

That dialog box seems to be one of the probs and I am assuming something similar is happening when I try to move the whole mix except you maybe bypass that box in your operation but it still causes a similar prob? any opinions

Thanks
AH PS I'll retry the full move and see if there is a message and I'll come back