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Question

Blender Add On not Working?

Forum|Forum|4 years ago
July 21, 2021
10 replies
19579 views

Hi! I run a Blender YouTube channel (southernshotty) and was excited to do a tutorial on the new mixamo add on, but it's not currently working for me.

I'm getting a recall error when generating the rig and it breaks the rig. Removing part of the arms.

I've tried it on two computers and three versions of blender.

Bug

D

Dap22184472ggp3

New Participant

hi please help

Im getting this error, tired all the fixes discussed but its not working

Python: Traceback (most recent call last):
File "C:\Users\AppData\Roaming\Blender Foundation\Blender\3.0\scripts\addons\mixamo_rig\mixamo_rig.py", line 152, in execute
_make_rig(self)
File "C:\Users\AppData\Roaming\Blender Foundation\Blender\3.0\scripts\addons\mixamo_rig\mixamo_rig.py", line 1900, in _make_rig
add_arm("Left")
File "C:\Users\AppData\Roaming\Blender Foundation\Blender\3.0\scripts\addons\mixamo_rig\mixamo_rig.py", line 1882, in add_arm
add_driver_to_prop(rig, 'pose.bones["'+n+'"].custom_shape_scale', 'pose.bones["'+c_hand_ik_name+'"]["ik_fk_switch"]', array_idx=-1, exp="1-var")
File "C:\Users\AppData\Roaming\Blender Foundation\Blender\3.0\scripts\addons\mixamo_rig\lib\drivers.py", line 11, in add_driver_to_prop
dr = obj.driver_add(dr_dp, array_idx)
TypeError: bpy_struct.driver_add(): property "pose.bones["Ctrl_ArmPole_IK_Left"].custom_shape_scale" not found

location: <unknown location>:-1

B

Bgorham00

New Participant

Blender 3.0 right? I get this same exact error with my model. Tried skinned, unskinned, with and without animation. Doesn't work 😕😕

B

Bgorham00

New Participant

Does this work for you?

https://youtu.be/U-CKospurc4?t=88

He literally just clicks it over and over again to "fix" it, but who knows?

D

defaultxty82dmxfygb

New Participant

I will go crazy,,
Sometimes the error does not happen and sometimes it does.

D

defaultxty82dmxfygb

New Participant

I think that some of the armatures in Mixamo have different names for the bones.. and here is the problem

schroef

Inspiring

Thats correct! ive seen this too, renaming does solve this issue

D

Dantino

New Participant

I had this problem too my solution was to eliminate all wheight groups before upload to mixamo.
Also, be shure to delete all objects floating, empties and cameras before upload it to mixamo.

I would love to know if that was of any help to anyone!

PS: love your vids southernshotty!

B

BTN9

Participating Frequently

How is this addon not working ... and Adobe isn't addressing it?

D

Diablomablo

Participating Frequently

Probably because it's a free tool. I assume it's a ticket in some engineers backlog with low priority. I'm glad I was able to get it to work though because it's been super useful for me as I don't know how to rig myself and I can easily apply animations from mixamo now to speed up my project.

Have you tried using Blenders rigify addon instead?

B

BTN9

Participating Frequently

Yeah, I've used both Rigify and own ARP for rigging. I just do a LOT of still life setups with people in them and liked to use Mixamo to quickly pose characters - usually the stuff gets me 80% of the way to what I need and then I tweak it a bit for what I need instead of doing every pose from scratch. Tweaking involves a lof of FK movement because that's the only way to adjust stuff from Mixamo and it gets tedious sometimes especially with hip/leg movement so this looked like it would help just smooth out the process. But it's been broken since day one and don't understand why it works for others. I've tried my characters, I've tried mixamo characters, I've tried 2.91, 2.92, 2.93 , I've used animations, A pose, T pose exports and nothing is working.

D

Diablomablo

Participating Frequently

In addition to this change others mentioned in objects.py to avoid duplicates (after line 88).

for collec in cs_grp.users_collection:
    if not collec in obj.users_collection:
        collec.objects.link(obj)
        assigned_collections.append(collec)

I also had to change maths_geo.py to return 0 if the vector length was 0 (after line 82).

def signed_angle(u, v, normal):
    nor = normal.normalized()
    if u.length == 0 or v.length == 0:
        return 0
    a = u.angle(v)
    c = u.cross(v)
    if c.length == 0 or nor.length == 0:
        return 0
    if c.angle(nor) < 1:
        a = -a
    return a

Addon location:

C:\Users\<user_name>\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\Mixamo add-on for Blender\lib

D

Diablomablo

Participating Frequently

Or maybe this makes more sense:

def signed_angle(u, v, normal):
    nor = normal.normalized()
    if u.length == 0 or v.length == 0:
        return 0
    a = u.angle(v)
    c = u.cross(v)
    if c.length == 0:
        return a # or -a, I'm not sure
    if c.angle(nor) < 1:
        a = -a
    return a

schroef

Inspiring

In both cases you would return -a, you sure thats correct?

schroef

Inspiring

Another issue ive found, it will not work below bl 2.90, the rotation of the limbs is off. Also DAE wont work, i did make a fix for that myself and that seems to work.

It would be nice if they also had renamed the bones in the Blender convention ending with .L and .R now we cant really fix weight painting easily, cant mirror it since Left and Right is mostly somewhere in the middle of the name.

TSEFilm

New Participant

I am somtimes getting an error as well, but even when I don't, it doesn't work. The addon only generates a controller for the whole rig (Ctrl_Master). No bones get controllers, no IK, nothing. I've tried with several different models direct from Mixamo and uploaded a couple of my own. Even tried downloading with Tpose and with animation, but I get similar results.

schroef

Inspiring

What does the console state in your case, it must return an error

Ussnorway7605025

Brainiac

older characters will work best for workflows as some of the newer models are made using different rigs + Blender is picky about [Fbx] file types

S

SouthernShotty3DAuthor

Participating Frequently

Thank you!

schroef

Inspiring

I also got an erro ron a certain file, though when i start the file from scratch and import the FBX from Mixamo again it does work.

For ne the issue was when its start to generate, it returns an error "cs>master already in Master Colection". I got that fixed my self by adding an extra line in objects.py #89. This is the line i added and added 1 indent to the 2 lines below

if not collec in obj.users_collection:

What is your exact error output, could you paste the error from the console here or add is as text file?

G

georgec98735022

New Participant

Hello, i also am getting errors trying to run the Create Control Rig button.

Python: Traceback (most recent call last):
  File "C:\Users\George\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\Mixamo add-on for Blender\mixamo_rig.py", line 176, in execute
    _make_rig(self)
  File "C:\Users\George\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\Mixamo add-on for Blender\mixamo_rig.py", line 1900, in _make_rig
    add_arm("Left")
  File "C:\Users\George\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\Mixamo add-on for Blender\mixamo_rig.py", line 1804, in add_arm
    add_driver_to_prop(rig, 'pose.bones["'+arm_name+'"].constraints["'+cns_fk_name+'"].influence', 'pose.bones["'+c_hand_ik_name+'"]["ik_fk_switch"]', array_idx=-1, exp="var")
  File "C:\Users\George\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\Mixamo add-on for Blender\lib\drivers.py", line 28, in add_driver_to_prop
    drivers_list = obj.animation_data.drivers
AttributeError: 'NoneType' object has no attribute 'drivers'

location: <unknown location>:-1

I'm using the latest version of Windows Blender 2.93.2

I uploaded a mesh to mixamo to get the skeleton/skin fbx file.
imported into a blank scene in blender and then tried to run the tool.

I also tried adding the code you mentioned to objects.py but still didn't work:

# assign to new collection
            assigned_collections = []
            for collec in cs_grp.users_collection:
                if not collec in obj.users_collection:
                    collec.objects.link(obj)
                    assigned_collections.append(collec)

Any idea how to fix it?

G

georgec98735022

New Participant

So a quick note, i was trying to apply the rig to a fbx file with no animation. just the model/skeleton fbx from mixamo. I just tried with a version that has an animation in the fbx and that worked! I don't know why, but there you go.

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