comfyanonymous
After Upgrade ComfyUI no longer starts: Python Packages suddenly missing
Custom Node Testing
- [x] I have tried disabling custom nodes and the issue persists (see how to disable custom nodes if you need help)
Expected Behavior
ComfyUI (Desktop Version for Windows) should start normally.
Actual Behavior
When starting ComfyUI I get this error image:
Steps to Reproduce
Upgrade Desktop Version of ComfyUI to latest version
Debug Logs
There are no logs
Other
No response
Unable to reproduce. Can you send:
- Your system specs (Windows version, hardware)
- Which ComfyUI Desktop version you upgraded from and to
- The full error message/screenshot you mentioned (the image didn't come through)
- Any console logs if available
I just got this same error, when I click install it doesn't do anything, terminal logs screen show this:
PS C:\AI\ComfyUi> & "C:\AI\ComfyUi\resources\uv\win\uv.exe" "venv" "--python" "3.12" "--python-preference" "only-managed" Using CPython 3.12.11 Creating virtual environment at: .venv ? A virtual environment already exists at.venv`. Do you want to replace it? [y/n] › yes
hint: Use the --clear flag or set UV_VENV_CLEAR=1 to skip this prompt
`
Version: ComfyUI Desktop for windows, latest OS: Windows 11 25H2
Extra nodes installed: ComfyUI Impact Pack ComfyUI_Essentials ComfyUI-VideoHelperSuite Rembg Background Removal Node for ComfyUI (Better)
Workaround/fix: Click on the "All" button chose reinstall, then during reinstall chose the option to migrate from an existing version
What I is renaming the .venv folder to .venv_old and click install again. It works again
