This has a few suggestions to try and overcome the same issue:-
https://forum.videohelp.com/threads/370533-tsMuxeR-giving-Reading-buffer-overflow-error-at-47-4
and the 3rd post down (and onwards) in here - https://forum.doom9.org/showthread.php?t=175120&page=4
and the forums at http://www.thestarwarstrilogy.com may also be a good place to see if others have had the same / similar issue and how they overcame it.
Good luck with it mate 😃