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[2.0.71] Crash during migration of Bulk Rail Loader and legacy-straight-rail (Rail::makeRealRailConnection)

Posted: Tue Oct 21, 2025 5:05 pm
by Sander20011
I wanted to migrate my modded savegame to 2.0 since all the mods I used are ported to 2.0 but when trying to load a save containing Bulk Rail Loaders to the new version of Bulk Rail Loaders it crashes.
I suspect it has something to do with the rail segments the entity places to connect the rails, but I am unable to test this myself.

Re: [2.0.71] Crash during migration of Bulk Rail Loader and legacy-straight-rail (Rail::makeRealRailConnection)

Posted: Wed Jun 24, 2026 9:48 pm
by ThePiachu
I also encountered this bug migrating my save to 2.0.77.
factorio-current.log
(25.73 KiB) Downloaded 19 times

Re: [2.0.71] Crash during migration of Bulk Rail Loader and legacy-straight-rail (Rail::makeRealRailConnection)

Posted: Thu Jun 25, 2026 2:56 pm
by robot256
I've seen this in the past when trying to migrate a pre-2.0 "straight-rail" directly to a 2.0 "straight-rail". The order of the connection points is different so it doesn't work. The solution is to migrate the old rails to a "legacy-straight-rail" prototype, and either leave them like that or use scripts to replace them with a new 2.0 "straight-rail" entity later.

It's very likely this is a problem in one or more of the Bulk Rail Loaders forks, but I haven't checked.