Fred,

I also converted my old ccf without any problems. But like Archer recommends, you might be better of if you import a ccf that just has the IR's in it and redesign from scratch. Sounds like a lot of work but after importing my whole ccf, I ended up gutting 90% of it anyway. I think it is easier to work on anew space vs. work around all of the old stuff, that you will probably throw away eventually.

Dave