Engine Error with Unofficial Patch Plus 11.5 Crash when exiting after Bach's Boss Fight in Society for the Preservation of Professors.
As the title says. When attempting to escape through the doors during the count down sequence with or without the professor, the game crashes with the following error.
I have tried on a separate save to avoid any discipline powers and simply use god mode to dispatch all the hunters to the same result.
I am running only Unofficial Patch Plus with no other modifications. I have reinstalled the patch and verified integrity of the files through steam. What other ways to fix this error should I do?
Edit: Avoiding the use of Possession while in the caves allowed me to progress without the crash.
4 comments · 92% upvoted · source · other discussions
This happened to me as well on the same mission, I just reloaded a save from just before I entered the actual underground area (not just the boss room) itself and avoided disciplines like Dominate
Wesp5 3 points · Sep 2026 · Bloodlines Unofficial Patch Creator
Yeah, this could have been caused by using Dominate to make hunters fight for you. Just avoid it and see if it works then!
Harvesting-Season [OP] 3 points · Sep 2026
Thanks for the quick reply.
Testing without using dominate, the crash was indeed avoided. This crash only started once I started to use Possession, thought in the exterior and interior there was no crash, only in the caves. Should I avoid all use of Possession for the time being?
Wesp5 2 points · Sep 2026 · Bloodlines Unofficial Patch Creator
Yes, this bug can happen elsewhere too. Or at least make sure the possessed enemies died ;).