I have some incorrect assumption but I don’t know where. I have checks for multiple mojibake variations. And - really - my code fixes the mojibake. I even have fixed double mojibake this way. See Recognising and fixing Mojibake - #12 by Julia_Truchsess . And no I didn’t get lucky.
@Christian_Schmitz : if this was MacRoman then the macRoman mojibake checker would find and fix that. I even have the raw data and can’t reproduce the problem.