# Crash on startup after update from 4.22 to 4.25.3 **URL:** \ **Category:** C++\ **Tags:** unreal-engine, UE4-25, question\ **Created:** [August 12, 2020, 11:40pm UTC](https://forums.unrealengine.com/t/crash-on-startup-after-update-from-4-22-to-4-25-3/469638 "2020-08-12T23:40:08Z")\ **Posts on this page:** 1\ **Showing post:** 6
**Author:** ![dukedukes](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@dukedukes](https://forums.unrealengine.com/u/dukedukes)\ **Post date:** [April 12, 2022, 2:20pm UTC](https://forums.unrealengine.com/t/crash-on-startup-after-update-from-4-22-to-4-25-3/469638/6 "2022-04-12T14:20:05Z")
Fixed this by following these instructions > [@Project Upgraded from 4.27 to UE5 Instantly Crashing](https://forums.unrealengine.com/t/project-upgraded-from-4-27-to-ue5-instantly-crashing/517658/5): > > Adding my experience to this thread as well. 4.26-\>5.0.0. We had a very large number of blueprint structs in our project, many of which were nested structs. Many of our game’s blueprint actors, data-tables, anim blueprints all had references to these structs which made the prospect of going through and recreating all of them from scratch or manually updating the references not really a feasible option. What I did that worked was the following: go through all of our structs one by one and re… I had some other issues aside from structs, some BP’s crashed while compiling. I disabled the problematic code to get around this issue. I also wiped my config directory temporarily, this at least helped me get into the editor where I narrowed down which BP’s/structs were causing the crashes. --- _[View the full topic](https://forums.unrealengine.com/t/crash-on-startup-after-update-from-4-22-to-4-25-3/469638)._