[Matplotlib-users] Agent Problem

[Lotfi B. <lb...@go...>]

I am using matplotlib since three months, every thing was fine untill today
I have got this error message which is strange and I could not figure out
what it means.
here I paste the error message I got.
"""
Another agent is running...
Failed to allocate the agent. Exitting...
Failed to invoking the agent: No such file or directory
Cannot launch the agent
The messenger is now down

"""
Does somebody knows where it comes from and how to cure it?
Thanks in advance
Lotfi