CK II - End of crusade crashes to desktop

[unwiseowl]

One line summary of your issue
End of crusade crashes to desktop

Game Version
3.0.1.1

What expansions do you have installed?

The Reapers Due,
Conclave,
Horse Lords,
Way of Life,
Charlemagne,
Rajas of India,
Sons of Abraham,
The Old Gods,
The Republic,
Legacy of Rome,
Sword of Islam,
Holy Fury

Do you have mods enabled?
No

Please explain your issue is in as much detail as possible.
Old Ironman save that predates latest crusade changes.

When the pope tries to declare the crusade won and the Emperor of the HRE the winner ( I didn't join as my leader was incapable at the time, but have joined recently) the game crashes to desktop.

No issues with crusades previously, first problem with this was following latest patch.

Steps to reproduce the issue.
1. Load game.
2. Wait for crusade to end.

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[MonzUn]

Hi! Thanks for reporting the crash.
Unfortunately, the save game is unsupported since it was made before 3.0 and resumed past 3.0.

The core issue is that before 3.0, the desert of Kyzul-Kum(east of the Aral Sea) was a normal province but after 3.0 it is a wasteland.
In your save, there is a character that owns that wasteland (characters should never own wastelands) and this character is also a dejoure vassal of one of the crusade participants.
This causes issues when attempting to resolve the crusade. On top of this there are also some other issues that I happened to spot that are direct effects of the wasteland having an owner, so even if you got past this crash, there would likely be more waiting down the line (There is for example a monastery in that wasteland as well).

So the save game was actually broken before this update, you were just lucky up until now, that having an owned wasteland hadn't already caused a crash

 

[unwiseowl]

Aha. Thanks for that.

Is it possible for me to backdate my game version and keep my save file as an Ironman game, or is it now unusable for achievements?

 

[MonzUn]

If you have an old version of the save game (backup or old autosave) you should be able to backdate your game and play on that save but any save that has ever past from before 3.0 to 3.0 or higher will be unstable. If you take this save and attempt to play it on an older version, you may also encounter issues as the save file will contain data that the old version do not recognize.

 

[unwiseowl]

Well, damn.

Thanks for the answers, anyway. Much obliged.