Windows exit code 9009

I am getting two different errors when I try to launch the webui.bat file from windows explorer. First one is this:

Couldn’t launch python

exit code: 9009

stderr:
Python was not found; run without arguments to install from the Microsoft Store, or disable this shortcut from Settings > Manage App Execution Aliases.

Launch unsuccessful. Exiting.
Press any key to continue . . .

So I go to «Manage app execution aliases» in windows and disable python. Then I get this message instead:

stderr:
‘python’ is not recognized as an internal or external command,
operable program or batch file.

Launch unsuccessful. Exiting.
Press any key to continue . . .

• OS: Windows 10
• Browser: Chrome

Thanks in advance for your help.

By Matthew Adams 🕜 Updated on April 22, 2025 at 1:30 pm

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Introduction :

The «webui-user.bat couldn’t launch Python» error, accompanied by the exit code 9009, can be frustrating for developers and users. This issue indicates a problem with launching Python through the webui-user.bat file, often encountered during web development or software execution. In this article, we will delve into the reasons behind this error and explore effective solutions to fix it. By understanding the causes and applying the appropriate troubleshooting steps, you can overcome the exit code 9009 issue and ensure the smooth execution of your Python-based projects.

Section 1: Understanding Exit Code 9009

The exit code 9009 is a numeric value returned by the operating system when a program or command fails to execute successfully. In the context of the «webui-user.bat couldn’t launch Python» error, this exit code signifies that the execution of the batch file was unsuccessful.

Section 2: Common Causes of «webui-user.bat Couldn’t Launch Python» 

There can be several reasons why the webui-user.bat file fails to launch Python. Some common causes include:

• Incorrect Python installation: If Python is not installed correctly or the path is not set properly, the batch file may fail to launch Python.
• Missing dependencies: The webui-user.bat file relies on certain dependencies or modules. If any of these dependencies are missing or not installed, Python execution can fail.
• File path issues: Incorrect file paths in the batch file or Python script can prevent the successful launch of Python.

Section 3: How to Fix «webui-user.bat Couldn’t Launch Python» 

• Verify Python installation and path: Ensure that Python is installed correctly and the PATH environment variable is set up properly. Reinstall Python if necessary and make sure the Python executable is accessible from any directory.
• Install required dependencies: Identify the dependencies needed by the webui-user.bat file and install them using package managers like pip. Ensure that the versions of these dependencies are compatible with the Python version being used.

Check file paths and permissions: 

Review the file paths mentioned in the batch file and Python script. Ensure that they point to the correct locations and that the necessary read and execute permissions are set.

Update antivirus and firewall settings: 

Sometimes, security software can interfere with the execution of batch files or Python scripts. Temporarily disable or adjust the settings of your antivirus or firewall software to see if it resolves the issue.

Run as administrator: 

Launching the webui-user.bat file with administrative privileges can help overcome certain permission-related issues. Right-click on the batch file and choose «Run as administrator.»

Section 4: Additional Tips for Troubleshooting

Check system logs and error messages for any additional information that might help pinpoint the cause of the issue.

Update Python to the latest stable version to take advantage of bug fixes and improvements.

Consider using a virtual environment to isolate your Python projects and dependencies, reducing the chances of conflicts.

Reach out to online communities, forums, or developer groups for assistance if you are unable to resolve the issue independently.

Conclusion :

The «webui-user.bat couldn’t launch Python» error with exit code 9009 can be resolved by understanding the underlying causes and following the appropriate troubleshooting steps. By verifying the Python installation, installing necessary dependencies, checking file paths, and considering other tips, you can overcome this issue and ensure smooth Python execution. Remember to stay up to date with the latest Python releases and seek assistance from the developer community when needed. With a systematic approach and persistence, you can overcome this error and continue your web development or software projects without interruptions.

1. Jan 25th, 2011, 08:09 PM

   
   

   #1

   Thread Starter

   
   New Member
   

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   Error :exited with code 9009
   

   I have problem when i run the program i got this Error:

   Error 1The command «f exist «C:\Documents and Settings\…\bin\Debug\Test.exe.locked» del «C:\Documents and Settings\..\bin\Debug\Test.exe.locked»
   if not exist «C:\…\bin\Debug\Test.exe.locked» if exist «C:\Documents and Settings\…\bin\Debug\Test.exe» move «C:\Documents and Settings\…\bin\Debug\Test.exe» «C:\Documents and Settings\…\bin\Debug\Test.exe.locked»» exited with code 9009. Test

   Can anyone help me to solve it plz

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2. Jan 25th, 2011, 08:25 PM

   
   

   #2

   
   PowerPoster
   

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   Re: Error :exited with code 9009
   

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3. Jan 25th, 2011, 08:46 PM

   
   

   #3

   Re: Error :exited with code 9009
   

   Originally Posted by abuamr

   I have problem when i run the program i got this Error:

   Error 1The command «f exist «C:\Documents and Settings\…\bin\Debug\Test.exe.locked» del «C:\Documents and Settings\..\bin\Debug\Test.exe.locked»
   if not exist «C:\…\bin\Debug\Test.exe.locked» if exist «C:\Documents and Settings\…\bin\Debug\Test.exe» move «C:\Documents and Settings\…\bin\Debug\Test.exe» «C:\Documents and Settings\…\bin\Debug\Test.exe.locked»» exited with code 9009. Test

   Can anyone help me to solve it plz

   Shows us the line of code that throw the exception. You can step thru the code or if you know what it is than post it here. From the looks of it you seem to be executing batch file commands.

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4. Jan 26th, 2011, 06:49 AM

   
   

   #4

   Thread Starter

   
   New Member
   

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   Re: Error :exited with code 9009
   

   How can i find the excpetion code??

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6. Jan 26th, 2011, 07:20 AM

   
   

   #5

   Re: Error :exited with code 9009
   

   Not the exception code, the line of code where this happens.

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7. Jan 26th, 2011, 08:14 AM

   
   

   #6

   Re: Error :exited with code 9009
   

   How much code is in your project? If it isn’t too much, can you post it? What is the text.exe and text.exe.locked files? What is it you are trying to do?

   -tg

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8. Jan 26th, 2011, 08:23 AM

   
   

   #7

   Thread Starter

   
   New Member
   

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   Re: Error :exited with code 9009
   

   Test is assembly name.

   the code is very big.

   Actually i got this problem when Copy and Past anything.

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9. Jan 26th, 2011, 08:33 AM

   
   

   #8

   Re: Error :exited with code 9009
   

   Here’s the deal… the snip you posted… isn’t VB Code… looks like possibly a batch script. Does that code appear in your project anywhere? Secondly, those commands and messing with files in the Debug folder, deleting them and moving them… and I’m not sure why or what the reason is.

   Did you look through the results from the search that Braille linked to? It would seem to suggest that you’re doing something either in the pre or post build events that maybe violating a file access.

   -tg

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11. Jan 26th, 2011, 08:37 AM

    
    

    #9

    Thread Starter

    
    New Member
    

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    Re: Error :exited with code 9009
    

    I added small code i got from the net in Pro and Post build.

    However i have deleted and still the problem running.

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