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Hi Denna, Do you know the approximate date of this 5.11.4 installation? The errors you're reporting appear to be the result a bug in the grid diagnostics libraries that was resolved some months back. If you are working with an installation older than February 2010 I would suggest downloading and building the latest 5.11.4 source package. Michael James Unidata > Full Name: Denna Demby > Email Address: address@hidden > Organization: Embry Riddle Aeronautical University > Package Version: 5.11.4 > Operating System: Linux Itanuim x64 > Hardware: > Description of problem: I am receiving the following error when I try to open > a .gem file: > > GEMPAK-GDCNTR>r > [FL -4] Cannot read file .... > [DM -7] Read error. > [GD -2] File /home/wxapps/gempak/GEMPAK5.11.4/gemdata/2009043012_nam211.gem > cannot be opened. > [DG -62] Grid file open failed in DG_NFIL. > Creating process: xw for queue 1540102 > > > Ticket Details =================== Ticket ID: XCW-838072 Department: Support GEMPAK Priority: Normal Status: Open