eof in grads

[suha aslam]

Dear Gradsusers,
        Following the website 
http://www.atmos.ucla.edu/~munnich/grads/EOF/index.html
 i tried to install the tool to compute eof in grads on my Windows2000 computer. The site does not clearly tells how to install it in a windows machine. I tried it and the following error messages pop up. 

ga-> sdfopen d:\rhum.mon.mean.nc
        Scanning self-describing file:  d:\rhum.mon.mean.nc
        Found 1 data variables in SDF file.
        Found displayable variable rhum with 8 levels in SDF file.
        SDF file d:\rhum.mon.mean.nc is open as file 1
        LON set to 0 360 
        LAT set to -90 90 
        LEV set to 1000 1000 
        Time values set: 1948:1:1:0 1948:1:1:0 
ga-> set t 1 20
        Time values set: 1948:1:1:0 1949:8:1:0 
ga-> eof rhum
       Writing data to transfer file...
       Executing eof binary ...
 
       Syntax Error:  Invalid Operand 
       'eofudf' not a variable or function name
       Error ocurred at column 1
       DISPLAY error:  Invalid expression 
       Expression = eofudf(rhum,20,12,-1,70,rhum_)
       eof.gs: First call of eofudf returned Error. STOP
ga-> 
         what could have been wrong?  can anybody used to this tool help me? when i tried to install it on linux (Redhat enterprise workstation) the situation was even worse. A help would be appreciated.
Thanks,
suha

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