How to fix error error-subst-to-join in Windows 11

Solution Steps

1. 1 Press Windows key + R to open the Run dialog. Type 'cmd' and press Ctrl+Shift+Enter to open Command Prompt as Administrator. Click Yes if prompted by User Account Control. This ensures you have the necessary permissions to view and change drive mappings.
2. 2 Type 'subst' and press Enter. This lists all current virtual drives. Look for any drive letter that might be using the path you are trying to assign. If you see a mapping that conflicts, note the drive letter.
3. 3 If you find a conflicting mapping, remove it by typing 'subst : /D' (replace with the actual drive letter, e.g., 'subst Z: /D') and press Enter. This deletes the virtual drive association, freeing the path for a new mapping.
4. 4 If the path is part of a network drive or joined volume, check your network connections. Open File Explorer, right-click on 'This PC', and select 'Disconnect network drive...' to remove any network drive that might be using the path.
5. 5 After clearing conflicts, retry your original SUBST command. For example, type 'subst X: C:\Users\YourName\Projects' and press Enter. If it succeeds, you will see no error message, and the drive will appear in File Explorer.
6. 6 If the error persists, restart your computer to clear any lingering file system locks, then try again.