So you don't have ANY URC MX880 remotes? All you would have to do is load it on your existing remote and see what happens. If it fails, no worries, you're having no problems loading your own file, so just download your config again. If its successful then you have truly helped me rule out Windows 7 as the issue.

Additonally, as I've reported in my earlier posts in this thread, I have tried to rebuild the file, adding one device at a time. Sometimes a new file works with a few devices then fails and sometimes it simply fails with only one device. Only thing that works consistently and every time without fail is when I load it under Windows XP.

I've been suffering this mess for years now. If ANYONE reading this thread has a working Windows 7 64bit OS and CCP working with MX880 and can take my file and load it successfully, I'm happy to provide... Thanks!