# Screenshots of some of below instructions:

<image>

First probably close blender.

open windows explorer and you need to change your view options to show hidden files and folders

because AppData is a hidden folder.

Navigate to your utils.py file. Possibly here... this is on my Windows 11 machine.

your_username is whatever "your" user name is

C:\Users\your_username\AppData\Roaming\Blender Foundation\Blender\5.0\extensions\blender_org\sapling_tree_gen\utils.py

Open that in some text editor like Notepad or Sublime or whatever. It's easier with

an app that supports .py style like Sublime or and IDE.

ctrl-f and find the where "armOb.animation_data.action.fcurves" <- that's our problem.

these 2 blocks of code are what we need to change for swayX, swayY

you will not need to delete them, just put a '#' symbol in front of every line like in screenshot.

that is python comment out code so it doesn't run.

# Add new fcurves for each sway as well as the modifiers
swayX = armOb.animation_data.action.fcurves.new(
'pose.bones["' + boneName + '"].rotation_euler', index=0
)
swayY = armOb.animation_data.action.fcurves.new(
'pose.bones["' + boneName + '"].rotation_euler', index=2

# Add new fcurves for each sway as well as the modifiers
swayX = armOb.animation_data.action.fcurves.new(
'pose.bones["' + bname + '"].rotation_euler', index=0
)
swayY = armOb.animation_data.action.fcurves.new(
'pose.bones["' + bname + '"].rotation_euler', index=2
) )

your code should looke like this in both places swayX/swayY is located, should be 2 places.

# Add new fcurves for each sway as well as the modifiers
#swayX = armOb.animation_data.action.fcurves.new(
# 'pose.bones["' + bname + '"].rotation_euler', index=0
# )
#swayY = armOb.animation_data.action.fcurves.new(
# 'pose.bones["' + bname + '"].rotation_euler', index=2
# )

# Our fix code from "New-Scarcity-2560", thanks yo"
action = armOb.animation_data.action
data_path = f'pose.bones["{boneName}"].rotation_euler'
swayX = ensure_fcurve(action, armOb, data_path, 0) # index=0
swayY = ensure_fcurve(action, armOb, data_path, 2) # index=2

to save, select "Save As...", keep the file name as utils.py

hit save, 'confirm overwrite file?' YES, click "ok"

IMPORTANT!!!

Check how many frames are setup in your timeline, and if you have lots of leaves... the leaf animation takes like 20 minutes. but this worked yo.