CharacterBuilder Error

[BobSilva]

Howdy! Very new at this, so this might be pilot error...

1. Imported a character from Mixamo.
2. Set rig to Humanoid, turned off Import Animations and dragged into scene.
3. Started Character Builder and dragged in the character from the scene.
4. Turn off Items, took the rest of the defaults and punched Build.
5. Threw the attached error.

Did I do something wrong?

 

[Justin]

This looks like the same error as before, and @Rastos mentioned a fix:

B

Thread 'Character Builder Error'

Jul 20, 2025

Got a: ArgumentNullException: Value cannot be null. Stack Trace attached as well as Screenshot of where error occurred.

I was creating my first and second characters -- ever. So, fully accept this could be my fault. Any guidance would be appreciated. Haven't tested them yet.

• BobSilva
• Replies: 7
• Forum: Ultimate Mirror Controller

 

[BobSilva]

Sorry Justin, you are absolutely right (of course). I wiped the scene from all UCC and UMC and started again. I actually RTFM'ed this time. I started with Atlas and everything worked wonderfully. Then I brought in Jolleen from Mixamo. She worked great, too. So, yeah, now I need to introduce UMC and get things working there as well.

Thank you for your time and patience.