Look for TSMuxer 1.10.6 - Newer versions are less reliable for making compliant discs.
Really? It’s been long enough since tsmuxer was abandoned, I wouldn’t have thought an even older version could be better. Do you know what changed/broke?
But even so, the newest has worked for me with many discs, so I’m kind of skeptical that some degree of imperfect compliancy is the issue if he is trying it on multiple players.
Are there discs that have worked? Something that was in ISO form, perhaps, where there’s not much room for user error? What brand of discs are they?