I’m currently on vacation and won’t have access to Factorio until May 15th, 2026, so I’m unable to debug or patch the issue right now.
From the information so far, I can already narrow the problem down a bit: the error suggests that the mod attempted to deconstruct an entity that doesn’t actually exist at the moment of evaluation. Internally, this points to the auto_decon storage not containing valid data — either because it tried to save a nil value, or because the storage structure wasn’t initialized on that save (which can happen when installing the mod into an already ongoing game).
That said, this type of issue can originate from a wide range of situations: a modded drill, an invalid ore patch below the drill, or a mismatch in the stored scan data. Without a reliable way to reproduce it, I can’t determine the exact cause.
If possible, please try to reproduce the error and send me the corresponding factorio-current.log (and ideally also factorio-previous.log). Once I’m back and have access to the game, I’ll be able to trace it properly and fix it.
Thanks for your patience — I’ll take care of it once I return.
