I don't think it's that behavior now that I re-read it. The locomotives were not blueprinted, they were placed as ghosts and without orders initially. I gave them the interrupt after they had all been built and left them in manual mode.

Trains which have all of their Ghost construction & Fuel requests fulfilled are set to Automatic mode.

I hadn't seen that! There might still be a bug here though - if you build all 6 artillery wagons in the save, the train will go into automatic mode when the first wagon is built - even though ...

As stated in title, I've observed this behavior - I recently replaced an artillery train with legendary artillery wagons, and that's when I first noticed this behavior. I built the first version of this artillery train a month or two ago and did not observe it then.

Steps to reproduce with the ...

Ehh, I was able to get pretty much everything I needed from the first-trip-to-vulcanus autosave. I used the bypass-library-sync method and dumped them to a book and re-imported them.

Lou, thanks! That save does indeed load without issue.

Would it be possible to get the non-offending blueprints out of that save or should I start going through my browser history to get my imports back?

Is there a set process to correctly restore steam cloud functionality without having the bad ...

I found this method but I still experience the same crash when loading my save with bypass-library-sync enabled. I also tried on 2.0.14 but the save will not load due to the save file being for a newer version (2.0.14-2 I think). Still unable to play my save at all.

Aha!

It appears that even with Cloud sync turned off in Steam, Factorio still looks in the C:\Program Files (x86)\Steam\userdata\<UserNumber>\427520\remote folder for blueprint storage (or steam still injects it into the game files).

After removing the files from that folder, I got an error when ...

I uninstalled the game, moved everything out of the AppData\Roaming\Factorio folder, installed the game, and went to start it and I'm still getting the same crash. Steam Cloud remains disabled from before I uninstalled. There are no blueprint-storage.dat files nor are there any saves.

Though I am ...

Here's my blueprint files:

I moved all the blueprint*.dat files as well as all the saves out of the factorio folder and onto my desktop. Still crashing when launching a new game.

Just updated to 2.0.16 and the crash occurs exactly the same. Here's the logs from that attempt.

Reconsolidating everything into the OP, original post below the break.

ISSUE: With a review of the crash logs, it appears that I have a corrupted/invalid blueprint in my game storage and in my Space Age save file. I was unable to load my save or start a new game as the game would crash right at the ...