Thanks for the answer. I will stay away from cover art from now on.
An excellent program by the way, I 've kissed other burning programs goodbye.
Keep up the good work!
No it doesn't do it with all files and I just found that in the files that the problem occurred, in metadata there was a field called <COVERART_UUENCODED> and had ASCII characters in it. I ripped the cds with Easy cd-da extractor. Once I removed that field with mp3tag, the problem was gone.
When I try to add an ogg file an error window is displayed with the message "external exception EEFFACE".
Flac and mp3 files are added with no problem. It also displayed a filter problem before the above message, but I installed Xiph.Org Ogg codecs and it disappeared. Thanks for any help you can give.