UE5.1 - Crash on import w/ 4.1 and 4.2

[brandon-reinhart]

Everything I import has a null _region so this code always crashes...

Is this a content error or code error? This is using the various Spine examples and a straight binary export to .skel.

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Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000020

UnrealEditor_SpinePlugin!spine::MeshAttachment::updateRegion() [C:\dev\dead-money\typing-game\TypingGame\Plugins\SpinePlugin\Source\SpinePlugin\Public\spine-cpp\src\spine\MeshAttachment.cpp:60]
UnrealEditor_SpinePlugin!spine::SkeletonBinary::readAttachment() [C:\dev\dead-money\typing-game\TypingGame\Plugins\SpinePlugin\Source\SpinePlugin\Public\spine-cpp\src\spine\SkeletonBinary.cpp:602]
UnrealEditor_SpinePlugin!spine::SkeletonBinary::readSkin() [C:\dev\dead-money\typing-game\TypingGame\Plugins\SpinePlugin\Source\SpinePlugin\Public\spine-cpp\src\spine\SkeletonBinary.cpp:486]
UnrealEditor_SpinePlugin!spine::SkeletonBinary::readSkeletonData() [C:\dev\dead-money\typing-game\TypingGame\Plugins\SpinePlugin\Source\SpinePlugin\Public\spine-cpp\src\spine\SkeletonBinary.cpp:271]
UnrealEditor_SpinePlugin!USpineSkeletonDataAsset::LoadInfo() [C:\dev\dead-money\typing-game\TypingGame\Plugins\SpinePlugin\Source\SpinePlugin\Private\SpineSkeletonDataAsset.cpp:228]
UnrealEditor_SpineEditorPlugin!USpineSkeletonAssetFactory::FactoryCreateFile() [C:\dev\dead-money\typing-game\TypingGame\Plugins\SpinePlugin\Source\SpineEditorPlugin\Private\SpineSkeletonImportFactory.cpp:90]

[brandon-reinhart]

More info. Importing a 4.1 .json works fine, but for .skel there is no version selector for export. Is the default .skel version format incorrect in 4.1 spine IDE?

Actually, it only sort of works fine. For the alien, I only see the jaw. That's probably a separate issue, though.

[lukeeingram]

Confirmed on Windows 10, current 4.1 version of the spine-ue4 runtime, and Spineboy exported from Spine version 4.1.19.
Customer forum post: https://esotericsoftware.com/forum/d/23839-spine-ue-just-doesnt-work/4