Just confirmed that this is a solution for me, in Avid 5.0.3.9. Was trying to transcode several days of P2 media via AMA, but couldn’t get past this error. That was, until I took half of the files, moved them to a new bin, and hit transcode. Now it’s cooking. I’ll have to go back and the other half later, but it’s a fairly simple workaround. It wouldn’t let me transcode more than 1000 media files (not clips, but actual P2 MXF media files) but it certainly would work if it was less than that.