For some reason, I have not been able to get Cygwin/X, the X-11 terminal emulator (which plotgrids_new.ncl requires to run), to install properly on my PC, even though I followed the steps in the User's Guide. One thing that I did notice however as I tried to install it, was that the option Unix/binary never appeared. Every time I installed Cygwin, the "X" icon never appears. I have written a couple of times to the ncl-install email address that is given in the User's Guide, but there doesn't seem to be anyone there.