https://imgur.com/a/zUN6qZy

+1

Same error here. I had this mod up and running, saved the game and exited Factorio. When I downloaded new mods and loaded the saved game (mods being synchronized at this point), I got the error reported above.

I found this workaround:
- Disable Flamethrower Fluid
- Load the game, synchronize it to enable the new mods -- but make sure to disable Flamethrower Fluid!
- Save the game and quit
- Enable Flamethrower Fluid
- Load the game, synchronize and enable Flamethrower Fluid again. The game should load without an error now.

Depending on the number of installed mods, that may take some time. Also, recipes (and items, I guess) from Flamethrower Fluid will be deleted on loading the game. I haven't researched even oil yet, so I don't mind, but once you've researched flame throwers, that workaround may damage your game!

In addition, this workaround is not permanent: The error will occur again if you add another mod!

I hope this information helps to find the error. :-)

Just noticed that the error will also reoccur if you remove a mod! The workaround sketched above also helps in this case.

Have you updated your mods? I'm running the latest version of Flamethrower Fluid (1.1.2) and have no problems loading my save.

Well, I'm still an idiot.

Just updated to 1.1.3, and the mod loads without crashing now. Thanks for the fix! :-)

Both the 1.1.1 and 1.1.2 bugs were just boneheaded little things that I know better than to do and would have caught with a little testing.

And all just to fix the recipe unlock, which is a tiny thing (which is probably why I didn't pay enough attention to what I was doing).