PieFedThe problem is older than I thought...
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https://sh.itjust.works/pictrs/image/bb3e940d-cef7-4c3d-9f18-7809f4a95844.jpeg
I guess now we finally know why Babbage never finished building the Analytical Engine.
There was a thread on Reddit where people likewise noted that having another person try problematic software solved the issue. So one commenter regaled how a dude sidestepped the whole rigmarole by saying to his colleague “look, this thing’s broken again”, and then before the other guy could step in, he clicked the thing himself, and it worked.