Issue with trace-admin permissions command

[Amol]

I have been using this same command for different users for last 2
years and it never threw and error

# trac-admin /home/test/trac permission add dev1 authenticated
invalid command name '/home/test/trac'

but now when i run it on my trac installation it gives an error as
above...any guesses?

[JackOfAll]

I experienced the same error, after removing and then running initenv.  Look for a file in the directory that is setup.py or any other executable Python script.
Hope this helps.

[RjOllos]

The issue sounds somewhat familiar. If you are okay with guesses, I'd say to check the permissions of your $TRACENV directory, and the trac.log file in particular.