From having tried several tests to find a fast way to convert abc's to xml I havent been too successful. So far the only thing that seems to work properly is abc to xml through Harmony. Harmony is the only program that Finale will accept XML files from without having error messages. I got ABC2XMl to work fine but I get error messages when I try to open those xml files with Finale. Any idea why?

It would help to say what the error messages actually are.

What happens if you try to import the XML into BarFly? That might give more helpful feedback. Usually when something like this happens there's only a minor disagreement about the syntax or character encoding behind it.

Care to tell us where you got the 6000 tunes? I know how long it took me to encode the 4000-odd that I have on my website.