OK, I have now successfully loaded the game! I _think_ the problem was that the Asphalt roads mod (https://mods.factorio.com/mod/AsphaltRoads/) was not in the mods list because it was not marked compatible with 1.1.x. I must've fiddled with this for the 1.0 version just to get things to work. Changi...

Thanks, I went back to load the game in 1.1.20 again and it got a little further this time - rendering a single frame before blowing up. However, this might be a pretty big clue as to what is going on (Or it might be nothing!)... The attached screenshot should have the ground fully covered in the As...

mod-list attached. Note that some of the mods (py* and BioIndustries) are from previous versions and customised locally, but I think you ought to be able to load the save with newer versions. I'm using patched versions of old ones because the recipes have changed a bunch since I started. You can pro...

Save's here: http://twigathy.com/factorio/factorio-bugreport-1.1.20-pymods.zip Altogether it looks like the mods and game files are 2.8GB - I can post those too if it helps (Although it'll take a little longer to upload!) In case it's helpful, here's the dmp. It looks like this crashed in native cod...

Sorry, this is 1.1.20

Hello, I've got a long-running game which I recently migrated from 0.17.79 over to 1.0, then to 1.1 (Couldn't go directly to 1.1). The save loads fine on 1.0, but breaks with the following trace on 1.1. Happy to provide the save and mods used (Py mods and a slew of other stuff), or the dump file, if...