Groom Binding Crashes in UE5

Development Character & Animation
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1

Hi there,
For a project we are working with groom imported as alembic file which should be attached to an alembic character.
With the new feature introduced in UE 4.27 we could do this by creating a binding but in UE_5.0.0 and UE_5.0.1 it just crash as soon as I assign the binding asset to the groom component.

UE 5 Groom Binding Crash
UE 5 Groom Binding Crash1000×623 78.9 KB

I tested this on different systems with different files and the result is always a crash.
Same files have no problem in 4.27.
I also migrated a level including these files from 4.27 to 5 and upon opening the level it crashes again.
I closed the viewport window and it worked but by opening it again it crashes and this is why I think it is related to rendering.

I will appreciate it if you give me an idea what to do.

7 Likes
3

Did you ever solve this? I have exactly the same problem and it’s causing me real headaches at the moment. Any advice/work arounds would be much appreciated.

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4

Yes, of course, this is a big problem. Unreal’s problem. That’s up to Epic Games to handle.

1 Like
6

Problem solved in UE 5.0.3

7

I updated to 5.0.3 but it still crashes.
I presume that this bug is a problem with the groom assets themselves in the first place.
The procedure is as follows.

  1. Create and save a groom asset.
  2. Exit the editor.
  3. Start the editor again and open the created groom asset. You can also check for bugs by just right-clicking.
8

I’ve had the same issue still in 5.0.3 and found out that the crash occurs when you specify an invalid AttachmentName, once you specify a valid one you can select a binding asset just fine.

9

Having the same issue. Do you mind elaborating a little on what counts as an invalid attachment name?

10

I have a similar issue in 5.4.4.
Assertion failed: CellIndex < uint32(Cells.Num()) [File:D:\build++UE5\Sync\Engine\Plugins\Runtime\HairStrands\Source\HairStrandsCore\Private\GroomBindingBuilder.cpp] [Line: 932]

It happens when there are binding files for hair to a mesh in the project. If I delete the binding files, the project opens. As soon as I create them again, the project crashes.

11

Tengo el mismo problema, no se como solucionarlo.

12

Hello guys,
i was have the same problem and after many tries to solve it i found the problem happen only with blender, and the main problem in scale only, make the scale centimeter and exporte fbx and the groom alembic with same scale.
plz report if the solution work for you