ValueError: This cab already exists and isn't an EndianBinaryWriter

[Thuya1980]

Code
from PIL import Image
import io
import UnityPy

all of the following would work

src = "D:\ZTA\Test2\UI_FirstLoading.unity3d"

env = UnityPy.load(src)
print(env)

for obj in env.objects:
if obj.type in ["Texture2D"]:
# export texture
data = obj.read()
if data.name == "Atlas_Menu02":
data.image.save(data.name+"_bak.png")
# edit texture
with Image.open("Atlas_Menu02.png") as pi_img:
data.image = pi_img
data.save()

with open("UI_FirstLoading_REPLACE.unity3d", "wb") as f:
f.write(env.file.save())

Error
Traceback (most recent call last):
File "C:\Users\Thuya\AppData\Local\Programs\Python\Python36\lib\runpy.py", line 193, in _run_module_as_main
"main", mod_spec)
File "C:\Users\Thuya\AppData\Local\Programs\Python\Python36\lib\runpy.py", line 85, in run_code
exec(code, run_globals)
File "c:\Users\Thuya.vscode\extensions\ms-python.python-2021.2.633441544\pythonFiles\lib\python\debugpy_main.py", line 45, in
cli.main()
File "c:\Users\Thuya.vscode\extensions\ms-python.python-2021.2.633441544\pythonFiles\lib\python\debugpy/..\debugpy\server\cli.py", line 444, in main
run()
File "c:\Users\Thuya.vscode\extensions\ms-python.python-2021.2.633441544\pythonFiles\lib\python\debugpy/..\debugpy\server\cli.py", line 285, in run_file
runpy.run_path(target_as_str, run_name=compat.force_str("main"))
File "C:\Users\Thuya\AppData\Local\Programs\Python\Python36\lib\runpy.py", line 263, in run_path
pkg_name=pkg_name, script_name=fname)
File "C:\Users\Thuya\AppData\Local\Programs\Python\Python36\lib\runpy.py", line 96, in _run_module_code
mod_name, mod_spec, pkg_name, script_name)
File "C:\Users\Thuya\AppData\Local\Programs\Python\Python36\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "d:\ZTA\Test2\Edit.py", line 20, in
data.image = pi_img
File "C:\Users\Thuya\AppData\Local\Programs\Python\Python36\lib\site-packages\UnityPy\classes\Texture2D.py", line 21, in image
self.image_data = img_data
File "C:\Users\Thuya\AppData\Local\Programs\Python\Python36\lib\site-packages\UnityPy\classes\Texture2D.py", line 35, in image_data
cab = self.assets_file.get_writeable_cab()
File "C:\Users\Thuya\AppData\Local\Programs\Python\Python36\lib\site-packages\UnityPy\files\SerializedFile.py", line 378, in get_writeable_cab
cab = self.parent.get_writeable_cab(name)
File "C:\Users\Thuya\AppData\Local\Programs\Python\Python36\lib\site-packages\UnityPy\files\File.py", line 81, in get_writeable_cab
"This cab already exists and isn't an EndianBinaryWriter")
ValueError: This cab already exists and isn't an EndianBinaryWriter

Bug
First time it's ok!
But second time it come with that error.

[K0lb3]

The error shows up when one tries to edit a Unity file that was already edited once before.
I strongly advice against doing so, as UnityPy doesn't clean up the external file data,
doing all modifications at once on the original file is the way to go, for now.

[Thuya1980]

Thanks.