An invalid character found in text content

Need some help, if you can .

I was voice tracking a show due to go out later today. I was voice tracking straight from the Database that is my usual method, Each time The VT would land in the database I’d save it,

I got half way down the first hour then I got a dianologue box with the message “An invalid character found in text content”, I looked at the log report but it doesn`t mean much to me, so I pressed contiune, I thought delete the voice track, save again, error stays

Voice tracks is MP3 128k Joint Stereo, I had to get cover I dont know how to fix in the time I had left

Check the surrounding music items for strange/invalid characters in any of the metadata fields (comment and attributes in particular).

Thanks for your advice

Strange though, Just as a test, I used the same hour, same songs, as before. No error this time round. Only thing different was a reboot after a windows update