watershed program

[John F. Stamm]

I would like to run the watershed program, just to see it's output.
I have gone throught the program, and the result is the following
command:

  ram el="elevation at PERMANENT" t=10000 ba="watershed.basins" 
      ac="accumulation.map"

However, I get garbage out.  Can anyone provide pointers --- do I 
need to provide a different elevation file? (maybe a filtered file?).
Thanks for any feedback.

John Stamm
Interactive Computer Graphics Lab
Princeton University