In case anyone has this problem in the future: ensure that the instructions used by your dll are available on the target CPU. I tried to call a dll that uses AVX on a Pentium CPU - which it doesn't have. Almost none of Atom, Celeron and Pentium families support AVX (Intel lists five models from 2014 and before).
I think the lesson to be learned here is, "If you try to run modern code on a CPU that was made last century, expect hiccups." 😄
Bill (Mid-Level minion.) My support system ensures that I don't look totally incompetent. Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all. Humble author of the CLAD Nugget.
