You're seeing this error message because you've tried to run a Python script that is not properly closed.
This is a common issue when working with subprocesses or processes in Python.
Here's how to fix this error:
- Ensure all processes are properly closed before running new ones.
- Use proper try-except blocks to handle errors gracefully.
- Check for uncaught exceptions in your code.
If you're still having issues, consider using Python's subprocess module for better control over processes.