An Exception Has Occurred

cvs not found!
The wrong path for this repository was configured, or the server on which the CVS tree lives may be down. Please try again in a few minutes.

Python Traceback

Traceback (most recent call last):
  File "/home/zool/opt/lib/python/viewvc-1.0.4/lib/viewvc.py", line 3665, in main
    request.run_viewvc()
  File "/home/zool/opt/lib/python/viewvc-1.0.4/lib/viewvc.py", line 238, in run_viewvc
    % self.rootname)
ViewVCException: ViewVC Unrecoverable Error: cvs not found!
The wrong path for this repository was configured, or the server on which the CVS tree lives may be down. Please try again in a few minutes.