no data category in legend

[DPOGUE at obsnsrv1.bio.uoknor.edu]

We are trying to remove the no data category on our output.  We have 
tried to edit the postscript file by removing the (no data) line, but 
we get an error that says:
        
           TRAILERPS: not found
            Error: /rangecheck

and others.  Any suggestions?

Thanks
Darrell Pogue
Tony Stancampiano