Crash on startup after update from 4.22 to 4.25.3

[M1rkwood]

Good Day. I have project on 4.22 . I copied whole project into new folder, download UE4 4.25, and tried to launch copied project with “generate VS project files” / “change project version”. After that, i’ve got crash report:

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Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xec3ecc96

UE4Editor_CoreUObject!FScriptMapHelper::WithScriptMap< >() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject\UnrealType.h:3390]
UE4Editor_CoreUObject!FScriptMapHelper::DestructItems() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject\UnrealType.h:4100]
UE4Editor_CoreUObject!FMapProperty::CopyValuesInternal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\PropertyMap.cpp:845]
UE4Editor_CoreUObject!FMapProperty::SerializeItem() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\PropertyMap.cpp:324]
UE4Editor_CoreUObject!FPropertyTag::SerializeTaggedProperty() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\PropertyTag.cpp:240]
UE4Editor_CoreUObject!UStruct::SerializeVersionedTaggedProperties() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:1457]
UE4Editor_CoreUObject!UStruct::SerializeTaggedProperties() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:1266]

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whole crash log:
[link text][2]

after that, i opened solution and tried to run debug, and got this:
ensure(!UberGraphFramePointerProperty == !UberGraphFunction);

i tried 4.24 and it works, but not in 4.25.3
i rly confused and need help pls.

[M1rkwood]

still need an answer pls

[errata]

Same issue here but with 5.x.

[TheOfficialBlaze]

I also have the same issue with ue5 when opening any blueprints related to a struct.

[dukedukes]

Also experiencing this converting a 4.26 project to 5.0

[dukedukes]

Fixed this by following these instructions

Project Upgraded from 4.27 to UE5 Instantly Crashing

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.