Update: Seems like it has something to do with the Fieldmapper.
I was trying to transfer the Ratings to Composer, and after i removed this from the process, it continued normally.
It seems like you have a rating below 0 somewhere, that would cause that error. Although the track browser won’t show anything below 0 so that might be hard to find… You could select all tracks with 0 rating and right click → Edit and then set it to 1, save, the back to 0. That should force it to be properly 0 everywhere.
The last few days I’ve tried to use multiple Betas, i have no idea if it was updated, but it didn’t work. Unfortunately, today my subscription expired, so i wasn’t actually able to transfer my collection -ratings included- to Serato.
Thank you for the offer. I’ve managed to do most of what I wanted without problems, except for transferring/remapping the ratings to a different field for Serato.
Thanks again, but you’ve worked hard to make our lives easier, and I respect that.
I hope you will be able to find a solution to the bug.