I’m working in 3.0 on a PC on a stand alone station. A guy from the camera rental place made the mxf’s from the ProRes. I don’t know how, but I assume he did it on a mac.
Earlier I tested the workflow (ProRes 4444 -> MetaFuze -> ALE -> AVID 3.0 -> relink) on a 2 sek alexa-file from the camera rental company and it worked.
I have the ProRes from the shoot and have also tried transcoding one of the files myself in MetaFuze with the exact same workflow as I used in the test, but I got the same error.