Visual Dataprep Viewport Crash

Hi there,

i am having trouble using the visual dataprep GLTF importer. I have a fresh Project and it started out working fine but now I get a crash whenever I try to load a GLTF, even a small one containing only three simple objects. Also, even if I create a new project it keeps crashing. In 4.27 it works though.

It is always crashing when it tries to “update the 3D viewer”.

Does anyone has a clue or a hint why this happens and what to do to get it running again?
For any help I’d be thankful!

regards, philipp

This is the message I get:

Assertion failed: false [File:D:\build++UE5\Sync\Engine\Plugins\Enterprise\DataprepEditor\Source\DataprepEditor\Private\Widgets\SDataprepEditorViewport.cpp] [Line: 861]

0x00007ff8ee48e489 UnrealEditor-DataprepEditor.dll!UnknownFunction []
0x00007ff8ee5b3385 UnrealEditor-DataprepEditor.dll!UnknownFunction []
0x00007ff8ee691715 UnrealEditor-DataprepEditor.dll!UnknownFunction []
0x00007ff8ee691056 UnrealEditor-DataprepEditor.dll!UnknownFunction []
0x00007ff8ee5c505a UnrealEditor-DataprepEditor.dll!UnknownFunction []
0x00007ff8ee551b9c UnrealEditor-DataprepEditor.dll!UnknownFunction []
0x00007ff8ee536ed8 UnrealEditor-DataprepEditor.dll!UnknownFunction []
0x00007ff91d3905f6 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff91d3b6793 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff91d14a3e8 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff91d12ffca UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff91d196743 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff91d185223 UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff91d17aecc UnrealEditor-Slate.dll!UnknownFunction []
0x00007ff97a0119a2 UnrealEditor-ApplicationCore.dll!UnknownFunction []
0x00007ff979ff67d1 UnrealEditor-ApplicationCore.dll!UnknownFunction []
0x00007ff97a014391 UnrealEditor-ApplicationCore.dll!UnknownFunction []
0x00007ff979feff93 UnrealEditor-ApplicationCore.dll!UnknownFunction []
0x00007ffa08eae858 USER32.dll!UnknownFunction []
0x00007ffa08eae299 USER32.dll!UnknownFunction []
0x00007ff97a015849 UnrealEditor-ApplicationCore.dll!UnknownFunction []
0x00007ff758727332 UnrealEditor.exe!UnknownFunction []
0x00007ff75874287d UnrealEditor.exe!UnknownFunction []
0x00007ff75874296a UnrealEditor.exe!UnknownFunction []
0x00007ff758745680 UnrealEditor.exe!UnknownFunction []
0x00007ff7587571b4 UnrealEditor.exe!UnknownFunction []
0x00007ff75875a516 UnrealEditor.exe!UnknownFunction []
0x00007ffa0a1674b4 KERNEL32.DLL!UnknownFunction []
0x00007ffa0a5226a1 ntdll.dll!UnknownFunction []

Crash in runnable thread StallDetectorThread

We are still investigating but for some reason UE is removing some files necessary to the dataprep.

Those dirty assets (with the stars) are missing in your plugin dataprep core

To get them back you will have to do a “verify” on your UE install in the epic games launcher

To not lose them again, do as @Antoine_Guillo recommends: after running dataprep they will be marked dirty, when you “save all” assets or quit unreal, Untick them and do not save those assets

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Hi @UE_FlavienP ,

this worked like a charm! I am so glad you had a fix for me, just in time! Thanks so much!

FYI that procedure won’t be needed with 5.1.1, which will have the fix for this issue. :slight_smile:



Thank you! It is working!!! :grinning:

Thanks for the fix. I also created short video about this fix/workaround:
Visual dataprep is great tool! We have to keep it working :wink:

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