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Hi Marty, The "nldn" alias only points to the most recent file in $GEMDATA/nldn/ - for 10/22 you'll need to explicitly call GDFILE = $GEMDATA/nldn/20121022HHMM.gem (where HHMM is the UTC time of file you wish to use). Michael > Michael, > > One more question. > > I am trying to plot lightning in CA from last Monday. (10/22). The files > exist in /data/data/nldn, but when I do a sfctime nldn, I get > [gempak@titan ~]$ sfctime nldn > 121026/1700 > > i.e. the last time only. How can I override that to plot history files. > > Thanks, > Marty > Ticket Details =================== Ticket ID: IPF-563953 Department: Support GEMPAK Priority: Normal Status: Open