Factorio Forums

I'm trying to debug this but I'm a little stuck.

I'm making some custom menu sims, which is fine. But sometimes when I copy a save from my saves folder to the mod folder and add it to the list, the sim will run for a few ticks (about 15 or so) and then the game completely freezes. No error message, no logs, nothing. Even the "geForce experience" overlay is frozen. Game doesn't respond to anything, and I have to kill it via task manager.

After some debugging, I tried just loading the original save file, then immediately re-saving it and copying the new save over. And now it works. No freeze, it just runs perfectly.

Any idea what might be causing this, or how to go about debugging it further?

Just a thought, but does your character inventory have any blueprints present in the save? There was a hint that <17.0 BPs are to deprecated.

See viewtopic.php?p=517501#p517501

This is speculation of course, but it seems plausible that the sim might not be migrating BPs and expects new ones.

The save files are kept minimal, made in Map Editor so character inventory is empty, and freshly made in 1.1.1

I like your guess though, nice find!