'python virtualenv on windows: Fatal error in launcher: Unable to create process using '"'
I have created a virtualenv in python 2.7 (Anaconda) on a dev machine and (after package installation) copied it to another windows machine in a PROD setting (no communication to outside). Executing any of the installed ".exe" entry points for a program in the virtualenv produces this error on the target machine however runs fine on the source machine:
(env) D:\app\pyvenv>env\Scripts\pip.exe
Fatal error in launcher: Unable to create process using '"'
The location of python installation on both machines is set to the same folder: C:\ProgramData\Anaconda2
Also see my additional notes at the bottom of this post. thanks
Solution 1:[1]
in my case, I previously changed the name of the python.exe executable to python3.exe so when I run:
virtualenv project1_env
it can't locate the python.exe if that was your case too .. just rename it again to python.exe and it should work.
Solution 2:[2]
In my case I uninstalled venv and then installed it again and it worked.
pip uninstall virtualenv to uninstall it and use pip install virtualenv to install it again.
Solution 3:[3]
I had the same problem. Try making virtualenv with this command:
virtualenv --python C:\Path\To\Python\python.exe venv
Note that you should specify the path to your python installation folder after --python option.
Solution 4:[4]
In my case I solve by upgrading pip using following code in activate environment.
python -m pip install --upgrade pip
Solution 5:[5]
python -m pip install --upgrade pip
Run this while in the venv. seems like a system change occured and reinstalling it restores it to default.
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | |
| Solution 2 | Yash Tile |
| Solution 3 | AlirezaAsadi |
| Solution 4 | Suman Aryal |
| Solution 5 | n1klaus |