[Solved][UE5] Mass AI - Some traits are requiring the presence of fragments which are missing

[shreks7]

Hi there,

I was following this video [UE5 MassAI Crowd in your project step by step guide Part 1 - YouTube]

However, I am getting “Some traits are requiring the presence of fragments which are missing” on UE5.1. Is there any documentation that points to the required fragments?

Here is my current fragment list -

Any pointers will be helpful. Thank you!

[shreks7]

[Update] Added Mass Viewer Info Fragment, Transform, Agent Radius inside Assorted Fragments (The log had more info)

I can see the Agents but they aren’t moving from their initial location.

Also I get this issue now -

LogMass: Error: Fragment(MassVelocityFragment) was added multiple time and can only be added by one trait. Fragment was added by:
LogMass: Error:         MassMovementTrait
LogMass: Error:         MassAgentMovementSyncTrait
LogMass: Error: Some fragments are added by multiple traits and can only be added by one!

Here is the list -

[shreks7]

Looks like you can ignore the multiple fragment error.

[Solved]
I was using a static mesh character (AnimToTexture) but I realized I need to wrap it within a Character BP that has a Capsule component and a Movement component.

If you are trying to use a custom character, start with a Character BP and build it up from there. Also watch this video [UE5 Tutorial MassAI Crowd in any project in less then 15 mins. - YouTube].

[MarshallZhang]

Hi sir, did you manage to bake a metahuman facemesh into VAT? Here’s the problem I encounted: I want to bake my own metahuman face mesh into VAT, but when I convert the skeletal mesh of this MH face mesh into static mesh, I found there’re 9 material slots in it (excluding slots for lods), which is same with the number of slots in its skeletal mesh. But there’re only 2 slots in static face meshes from the City Sample. Do I need to export my skeletal mesh into some other 3D softwares to reorganize the slots to match the example from the City Sample or this really doesn’t matter, I just should bake every of these 9 material into VAT? Looking forward to your answer and thanks in advanced.

[RajatVaruna]

Hi

Having same issue on UE 5.1 can u please explain a bit.? how u solved that.

[Kunal_Bhorodiya]

Found Something ???

[82d09b48b270419c9db80d4f0d108d20 (丶灰原丶)]

UE5.2 load order is important, you can follow the way I added without adding any traits to your characters

This error is that there is some problem with the code and will not have any impact on the operation, and the code hint error is to ensure the uniqueness of fagment.

[shulideren]

@shreks7

was added by:
LogMass: Error:         MassMovementTrait
LogMass: Error:         MassAgentMo

is work!! thank you