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Lynn, You can use gddelt to remove the offending grids and this will make garp happy. Use gdnum=list to list out the grids and remove by numbers. You should be able to use gdmod to copy all the eta grids to a single file. You can use gdcfil to create the empty grid file using cpyfil=#104 (or one of the existing files). Steve Chiswell Unidata User SUpport >From: Lynn McMurdie <address@hidden> >Organization: . >Keywords: 199907082107.PAA07279 >Hi Steve... > >Thanks for your quick response. I have used gdinfo on the files in >question and have indeed discovered a few grids where there were >blanks for the vertical coordinate: > >266 990301/0000F012 0 CLD >267 990301/0000F012 0 PRES >268 990301/0000F012 0 TROP HGHT > >So, probably your right about that being the problem. I'm >trying to uncover exactly what was used to make the gempak files (I >didn't actually do that, another computer support person here did it), >so when I hear back from him, I'll let you know. However, these >particular grids with no heights aren't crucial for what we want, >couldn't we just eliminate them from the gridfile? Would that make >garp happy?? > >Also, you were right about eta104 files. I used gdinfo to look at >each file and the forecast files did have a few grids at the beginning >that had time1 and time2. They were some sort of time-averaged info: > > 12 990301/0000F006 990301/0000F012 0 PRES AVE_FXSN > 13 990301/0000F006 990301/0000F012 0 PRES AVE_SWRU > 14 990301/0000F012 0 CLDT HGHT > 15 990301/0000F012 0 CLDT PRES > >So....can I combine all these files into one big grid file? Would >that solve the problem??? Thanks for your help > Lynn >-- >Lynn McMurdie INTERNET: address@hidden >(206) 685-9405 UUCP: uw-beaver!atmos.washington.edu!mcmurdie >Dept of Atmospheric Sciences >University of Washington >Box 351640 >Seattle, WA 98195 >