However, I want to apply Mixamo animations. After importing the animation into Isaac Sim and adding the two attributes, “CustomCommandName” and “CustomCommandTemplate”, when I try to add the animation in the “Custom Command” panel in “Command Setting”, an error keeps popping up saying that it cannot find the two attributes.
yes, the character downloaded from Mixamo has already been retargeted and can use commands in Isaac Sim (GoTo / Idle / LookAround), but animations from Mixamo cannot be used as described earlier.
I’ve added the animation to the ‘Custom Command’ after setting ‘Set as Default Prim,’ but the animation is still not executing on the biped_demo. Could this be an issue with the animation downloaded from Mixamo?
Yes, I’ve moved the SkelAnimation under the defaultPrim; however, the character still cannot play the animation. I tested this with a biped character and also used Actor SDG to generate my character, but neither can play the USD animation ‘run_ani.anim’, character remains in a “T-pose”.
The method you provided worked successfully, as shown in the video. However, how can I use Actor SDG to generate a character and have that character perform a running animation?
In other words, once I’ve downloaded an animation from Mixamo, how do I use it within Omniverse?
I know that “Command Settings” panel needs to be set up but even after completing that, I still cannot successfully apply the Mixamo animation.
Download Mixamo animation (.fbx file) → import to isaac sim → duplicate the SkelAnimation → unparent the duplicate one, delete the original one ->add a xform and set as default prim, and add attribute.
The animations I download from Mixamo always include a skeleton, even if I select the ‘Without Skin’ option. And I can not move the animation unless I duplicate it.
Add the animation in “Custom Command” of Command Setting Panel. Note that “TypeKeyboard” Animation is from Isaac Sim, I used it to test Actor SDG. And “Run” is the animation downloaded from Mixamo.
The animation sn’t working on the characters. There’s no error message, but I’m getting warning as below.
2026-04-21 01:08:44 [Warning] [omni.anim.asset] Failed to compile Animation. ‘/World/Characters/Biped_Setup/CustomCommandAnimations/Run’ is not a valid UsdSkelAnimation
2026-04-21 01:08:44 [Warning] [omni.anim.asset] Failed to compile asset ‘/World/Characters/Biped_Setup/CustomCommandAnimations/Run’:
2026-04-21 01:08:44 [Warning] [omni.anim.graph.core.python] Type mismatch for variable Action in Character::SetVariable
Please note that if I remove the “Run” Animation from “Step 2”, “TypeKeyboard” is working on the characters. So maybe the problem is the “Run” Animation?
