OSError: [WinError 233] No process is on the other end of the pipe #99440

New Issue

System Information
Operating system: Microsoft Windows 10 Home
Graphics card: Radeon RX 5700XT

Blender Version
Blender 2.93.9

Short description of error
After installing the cat add-on I have received the following error when attempting to import FBX models:

Python: Traceback (most recent call last):
  File "C:\Program Files\Blender Foundation\Blender 3.2\3.2\scripts\addons\io_scene_fbx\__init__.py", line 200, in execute
    if import_fbx.load(self, context, filepath=path, **keywords) == {'FINISHED'}:
  File "C:\Program Files\Blender Foundation\Blender 3.2\3.2\scripts\addons\io_scene_fbx\import_fbx.py", line 2416, in load
    print("FBX version: %r" % version)
OSError: [WinError 233] No process is on the other end of the pipe

Exact steps for others to reproduce the error

Install the cat add-on and enabled it (Blender shows error)
Attempt to remove it (Blender shows error)

Attempt to import FBX (Blender shows error)

Python Error.blend

**System Information** Operating system: Microsoft Windows 10 Home Graphics card: Radeon RX 5700XT **Blender Version** Blender 2.93.9 **Short description of error** After installing the cat add-on I have received the following error when attempting to import FBX models: ![Screenshot_357.png](https://archive.blender.org/developer/F13258137/Screenshot_357.png) ``` Python: Traceback (most recent call last): File "C:\Program Files\Blender Foundation\Blender 3.2\3.2\scripts\addons\io_scene_fbx\__init__.py", line 200, in execute if import_fbx.load(self, context, filepath=path, **keywords) == {'FINISHED'}: File "C:\Program Files\Blender Foundation\Blender 3.2\3.2\scripts\addons\io_scene_fbx\import_fbx.py", line 2416, in load print("FBX version: %r" % version) OSError: [WinError 233] No process is on the other end of the pipe ``` **Exact steps for others to reproduce the error** - Install the cat add-on and enabled it (Blender shows error) - Attempt to remove it (Blender shows error) # Attempt to import FBX (Blender shows error) [Python Error.blend](https://archive.blender.org/developer/F13258044/Python_Error.blend)

Added subscriber: @RandomnessRemedy

#104161 was marked as duplicate of this issue

#104201 was marked as duplicate of this issue

blender/blender-addons#103970 was marked as duplicate of this issue

#103297 was marked as duplicate of this issue

#102258 was marked as duplicate of this issue

#101949 was marked as duplicate of this issue

blender/blender-addons#101474 was marked as duplicate of this issue

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blender/blender-addons#101119 was marked as duplicate of this issue

#101015 was marked as duplicate of this issue

#100979 was marked as duplicate of this issue

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#99782 was marked as duplicate of this issue

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blender/blender-addons#99240 was marked as duplicate of this issue

blender/blender-addons#99245 was marked as duplicate of this issue

Added subscriber: @PratikPB2123

Hi, thanks for the report. Can you share the error your getting? (attach a screenshot or paste it from console)
cats-blender-plugin is not maintained by blender developers.
So if issue is particularly occurring when that plugin is enabled then please report your issue at https://github.com/absolute-quantum/cats-blender-plugin/issues

Hi, thanks for the report. Can you share the error your getting? (attach a screenshot or paste it from console) cats-blender-plugin is not maintained by blender developers. So if issue is particularly occurring when that plugin is enabled then please report your issue at https://github.com/absolute-quantum/cats-blender-plugin/issues

Changed status from 'Needs Triage' to: 'Needs User Info'

![Screenshot_357.png](https://archive.blender.org/developer/F13258137/Screenshot_357.png)

Thanks. Think this is same as blender/blender-addons#97428
original reporter of blender/blender-addons#97428 has solved this error by removing the malwares. Can you check if same is the culprit for you?

Thanks. Think this is same as blender/blender-addons#97428 original reporter of blender/blender-addons#97428 has solved this error by removing the malwares. Can you check if same is the culprit for you?

it still giving me the error

Added subscriber: @rjg

@RandomnessRemedy Did you follow the instructions that I've linked in the other ticket (https://support.microsoft.com/en-us/windows/help-protect-my-pc-with-microsoft-defender-offline-9306d528-64bf-4668-5b80-ff533f183d6c) or did you use another AV-software / virus removal tool?

i use windows defender since thats what i only use

@RandomnessRemedy Please make sure that you run Windows Update before following the linked guide and/or double-check with another tool such as Microsoft Safety Scanner, Sophos Scan & Clean, Norton Power Eraser, etc. in case Defender missed it.

still giving me the error

@RandomnessRemedy Could you please check if there are issues with corrupted system files with the following steps, based on this guide by Microsoft :

Open an elevated command prompt by
- pressing the Windows key or opening the Start menu
- typing "cmd", an entry titled "Command Prompt" should appear
- selecting "Run as administrator"
Run the Deployment Image Servicing and Management tool to load a clean image which can then be used to restore corrupted files. Copy and paste the following command, then press enter: DISM.exe /Online /Cleanup-image /Restorehealth
Run the System File Checker tool to scan your system for corrupted files and repair them. Copy and paste the following command, then press enter: sfc /scannow

@RandomnessRemedy Could you please check if there are issues with corrupted system files with the following steps, based on [this guide by Microsoft ](https://support.microsoft.com/en-us/topic/use-the-system-file-checker-tool-to-repair-missing-or-corrupted-system-files-79aa86cb-ca52-166a-92a3-966e85d4094e): - Open an elevated command prompt by - pressing the Windows key or opening the Start menu - typing "cmd", an entry titled "Command Prompt" should appear - selecting "Run as administrator" - Run the *Deployment Image Servicing and Management* tool to load a clean image which can then be used to restore corrupted files. Copy and paste the following command, then press enter: `DISM.exe /Online /Cleanup-image /Restorehealth` - Run the *System File Checker* tool to scan your system for corrupted files and repair them. Copy and paste the following command, then press enter: `sfc /scannow`

If this does not help, please open Blender's installation directory and double-click the blender_factory_startup.cmd to start it (temporarily) with the factory default settings. Are you able to successfully export the FBX in this case?

If this does not help, please open Blender's installation directory and double-click the `blender_factory_startup.cmd` to start it (temporarily) with the factory default settings. Are you able to successfully export the FBX in this case?

yep with the factory settings in works now thanks

In that case this does appear to be caused by an add-on you have installed. What seems to be odd is that your original report stated that all version of Blender were affected, although you just installed the cats add-on for one particular version. Could you clarify whether your installed the add-on for other versions as well?

If you haven't permanently reset the settings already, could you please open Blender and save your system information through Help > Save System Info in Blender? This file includes a list of add-ons you have enabled.

In that case this does appear to be caused by an add-on you have installed. What seems to be odd is that your original report stated that all version of Blender were affected, although you just installed the cats add-on for one particular version. Could you clarify whether your installed the add-on for other versions as well? If you haven't permanently reset the settings already, could you please open Blender and save your system information through *Help > Save System Info* in Blender? This file includes a list of add-ons you have enabled.

i had the addon on 2.93 but then when i added it to the new one it broke everything even the steam version of blender{F13262997}

i had the addon on 2.93 but then when i added it to the new one it broke everything even the steam version of blender{[F13262997](https://archive.blender.org/developer/F13262997/system-info.txt)}

If the executable from steam and portable/standalone were the same version of Blender, then they shared the preferences and add-ons.

It has to be checked whether this is an implementation error in the add-on or if this is a bug in Blender's Python API.

If the executable from steam and portable/standalone were the same version of Blender, then they shared the preferences and add-ons. It has to be checked whether this is an implementation error in the add-on or if this is a bug in Blender's Python API.

Changed status from 'Needs User Info' to: 'Needs Triage'

how would i check that

That is not something you would have to check, but members of the triaging team or developers of the add-on should. In order to potentially speed this up, I would recommend that you create a ticket on the cats add-on's GitHub repository , since this appears to be caused by their add-on.

Due to my other obligation I have not yet had time to test whether I can reproduce the issue in a Windows VM. @PratikPB2123 Perhaps you can check if this issue is reproducible?

That is not something you would have to check, but members of the triaging team or developers of the add-on should. In order to potentially speed this up, I would recommend that you create a ticket on the [cats add-on's GitHub repository ](https://github.com/absolute-quantum/cats-blender-plugin/issues), since this appears to be caused by their add-on. Due to my other obligation I have not yet had time to test whether I can reproduce the issue in a Windows VM. @PratikPB2123 Perhaps you can check if this issue is reproducible?

@rjg , I'm able to import FBX files (example file ) even when cats plugin is enabled (Tested in Window 11, 10. Blender version: 2.93, 3.3)

@rjg , I'm able to import FBX files ([example file ](https://developer.blender.org/F12964787)) even when cats plugin is enabled (Tested in Window 11, 10. Blender version: 2.93, 3.3)

Added subscriber: @Zwan

Added subscriber: @zLeandre

Added subscriber: @vohoangphuc

@Zwan @zLeandre @vohoangphuc Please also upload your system information from Help > Save System Info here. Additionally, please check if the issue appears for you too, when Blender is started through blender_factory_startup.cmd.

@Zwan @zLeandre @vohoangphuc Please also upload your system information from *Help > Save System Info* here. Additionally, please check if the issue appears for you too, when Blender is started through `blender_factory_startup.cmd`.

Added subscribers: @Unnikrishnan-M, @visigral

Added subscriber: @shadowguy991

Added subscriber: @Ree3kidd

I keep getting a python traceback error when i try importing obj files but when i import smaller obj files i get no error why is that? Also when i import other obj files or older bigger ones they work fine.

@Ree3kidd If you are not seeing the exact error OSError: [WinError 233] No process is on the other end of the pipe, then please create a separate bug report through Help > Report a Bug in Blender.

@Ree3kidd If you are not seeing the exact error `OSError: [WinError 233] No process is on the other end of the pipe`, then please create a separate bug report through *Help > Report a Bug* in Blender.

In #99440#1387666, @rjg wrote:
@Zwan @zLeandre @vohoangphuc Please also upload your system information from Help > Save System Info here. Additionally, please check if the issue appears for you too, when Blender is started through blender_factory_startup.cmd.

system-info.txt can you check here

> In #99440#1387666, @rjg wrote: > @Zwan @zLeandre @vohoangphuc Please also upload your system information from *Help > Save System Info* here. Additionally, please check if the issue appears for you too, when Blender is started through `blender_factory_startup.cmd`. [system-info.txt](https://archive.blender.org/developer/F13318009/system-info.txt) can you check here

@vohoangphuc Could you please check if disabling blenderkit resolves the issue for you?

Added subscriber: @ninashaw

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Added subscriber: @abraham.esteva

Added subscriber: @ChrissyWinton

Added subscriber: @soccer

This comment was removed by @soccer

*This comment was removed by @soccer*

@rjg Could you please help me to fix this problem. I have following steps, based on this guide by Microsoft but it still error. This is my system-info.system-info.txt

@rjg Could you please help me to fix this problem. I have following steps, based on this guide by Microsoft but it still error. This is my system-info.[system-info.txt](https://archive.blender.org/developer/F13570436/system-info.txt)

@soccer Could you please check if running Blender with temporary factory default settings avoids this issue? Open Blender's installation directory and double-click the blender_factory_startup.cmd.

@soccer Could you please check if running Blender with temporary factory default settings avoids this issue? Open Blender's installation directory and double-click the `blender_factory_startup.cmd`.

I have open blender's with blender_factory_startup.cmd and blender_debug_gpu.cmd is can avoids this issue. It have another solution to fix Winerror 233?

@soccer I'm sorry, I do not understand your question. Do you still see the error when using blender_factory_startup.cmd?

@soccer I'm sorry, I do not understand your question. Do you still see the error when using `blender_factory_startup.cmd`?

When I using blender_factory_startup.cmd it not see the error. But when i use the blender not by blender_factory_startup_cmd it still error.
Do you have another solution to fix Winerror 233 when i not use blender_factory_startup.cmd.

When I using blender_factory_startup.cmd it not see the error. But when i use the blender not by blender_factory_startup_cmd it still error. Do you have another solution to fix Winerror 233 when i not use blender_factory_startup.cmd.

@soccer In that case it seems that one of your add-ons triggers the issue. According to your system-info.txt you have the following add-ons enabled:

io_anim_bvh (version: (1, 0, 0), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_anim_bvh\__init__.py)
io_curve_svg (version: UNKNOWN, path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_curve_svg\__init__.py)
io_mesh_ply (version: (2, 2, 0), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_mesh_ply\__init__.py)
io_mesh_stl (version: (1, 1, 3), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_mesh_stl\__init__.py)
io_mesh_uv_layout (version: (1, 1, 1), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_mesh_uv_layout\__init__.py)
io_scene_fbx (version: (4, 29, 1), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_scene_fbx\__init__.py)
io_scene_gltf2 (version: (1, 8, 19), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_scene_gltf2\__init__.py)
io_scene_obj (version: (3, 9, 0), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_scene_obj\__init__.py)
io_scene_x3d (version: (2, 3, 0), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_scene_x3d\__init__.py)
cycles (version: UNKNOWN, path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\cycles\__init__.py)
node_wrangler (version: (3, 38), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\node_wrangler.py)
blenderkit (version: (3, 1, 3), path: C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\blenderkit\__init__.py)
mesh_f2 (version: (1, 8, 4), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\mesh_f2.py)
rigify (version: (0, 6, 5), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\rigify\__init__.py)
lightning_boy_shader (version: (2, 1, 1), path: C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\lightning_boy_shader\__init__.py)
NodePreview (version: (1, 8), path: C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\NodePreview\__init__.py)

Could you please try the following:

Open the Windows Explorer
Navigate to C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender

Create a ZIP archive of the `3.1` folder by right-clicking on it and then selecting Send to > Compressed (zipped) folder. Upload the ZIP archive here.

Once you have uploaded your preferences, please check which add-on might cause the problem. Start with the add-ons NodePreview, lightning_boy_shader, blenderkit, rigify, node_wrangler and io_scene_x3d.

Open Blender normally
Go to the add-on preferences (Edit > Preferences > Add-ons)
Disable one activated add-on
Save your preferences
Close Blender
Restart Blender and check if the error still happens

If yes, repeat from step 2) with a different add-on

If it is caused by an add-on, the error should disappear once you have disable it.

@soccer In that case it seems that one of your add-ons triggers the issue. According to your `system-info.txt` you have the following add-ons enabled: ``` io_anim_bvh (version: (1, 0, 0), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_anim_bvh\__init__.py) io_curve_svg (version: UNKNOWN, path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_curve_svg\__init__.py) io_mesh_ply (version: (2, 2, 0), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_mesh_ply\__init__.py) io_mesh_stl (version: (1, 1, 3), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_mesh_stl\__init__.py) io_mesh_uv_layout (version: (1, 1, 1), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_mesh_uv_layout\__init__.py) io_scene_fbx (version: (4, 29, 1), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_scene_fbx\__init__.py) io_scene_gltf2 (version: (1, 8, 19), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_scene_gltf2\__init__.py) io_scene_obj (version: (3, 9, 0), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_scene_obj\__init__.py) io_scene_x3d (version: (2, 3, 0), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\io_scene_x3d\__init__.py) cycles (version: UNKNOWN, path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\cycles\__init__.py) node_wrangler (version: (3, 38), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\node_wrangler.py) blenderkit (version: (3, 1, 3), path: C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\blenderkit\__init__.py) mesh_f2 (version: (1, 8, 4), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\mesh_f2.py) rigify (version: (0, 6, 5), path: E:\All blender\Blender Launcher\Blender launcher location\stable\blender-3.1.0+stable.c77597cd0e15\3.1\scripts\addons\rigify\__init__.py) lightning_boy_shader (version: (2, 1, 1), path: C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\lightning_boy_shader\__init__.py) NodePreview (version: (1, 8), path: C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\NodePreview\__init__.py) ``` Could you please try the following: - Open the Windows Explorer - Navigate to `C:\Users\Admin\AppData\Roaming\Blender Foundation\Blender` # Create a ZIP archive of the `3.1` folder by right-clicking on it and then selecting *Send to > Compressed (zipped) folder*. Upload the ZIP archive here. Once you have uploaded your preferences, please check which add-on might cause the problem. Start with the add-ons `NodePreview`, `lightning_boy_shader`, `blenderkit`, `rigify`, `node_wrangler` and `io_scene_x3d`. - Open Blender normally - Go to the add-on preferences (*Edit > Preferences > Add-ons*) - Disable one activated add-on - Save your preferences - Close Blender - Restart Blender and check if the error still happens # If yes, repeat from step 2) with a different add-on If it is caused by an add-on, the error should disappear once you have disable it.

I have check add-on according to instructions. When i disable only io_scene_x3d it not error one time. And when i disable blnderkit it have report error.

I have check add-on according to instructions. When i disable only io_scene_x3d it not error one time. And when i disable blnderkit it have report error.![When disable blnderkit out .png](https://archive.blender.org/developer/F13587725/When_disable_blnderkit_out_.png)

@soccer The BlenderKit error seems unrelated at the moment.

Does the WinError 233 disappear completely when io_scene_x3d is disabled?
What did you do to test whether the error still occurs?
Could you also please upload the ZIP files with your user preferences?

@soccer The BlenderKit error seems unrelated at the moment. - Does the `WinError 233` disappear completely when `io_scene_x3d` is disabled? - What did you do to test whether the error still occurs? - Could you also please upload the ZIP files with your user preferences?

Added subscriber: @Srtheboxq

Does the WinError 233 disappear completely when io_scene_x3d is disabled?

it work one time and it still error in the next time
What did you do to test whether the error still occurs?
I export file .FBX to check error.
Could you also please upload the ZIP files with your user preferences?
sure sir.This is correct? 3.1.zip

Does the WinError 233 disappear completely when io_scene_x3d is disabled? - it work one time and it still error in the next time What did you do to test whether the error still occurs? - I export file .FBX to check error. Could you also please upload the ZIP files with your user preferences? - sure sir.This is correct? [3.1.zip](https://archive.blender.org/developer/F13599114/3.1.zip)

Thank you for the information, we will have to check whether we can reproduce the issue with your supplied files.

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OSError: [WinError 233] No process is on the other end of the pipe #99440

Attempt to import FBX (Blender shows error)

Create a ZIP archive of the 3.1 folder by right-clicking on it and then selecting Send to > Compressed (zipped) folder. Upload the ZIP archive here.

If yes, repeat from step 2) with a different add-on

Create a ZIP archive of the `3.1` folder by right-clicking on it and then selecting Send to > Compressed (zipped) folder. Upload the ZIP archive here.