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Hi, I'm not an IDL user, so don't know how to invoke it from IDL. Here's an IDL package written by David Fanning that provides the kind of information ncdump does, so you might also try it to see if it works for what you need: http://www.dfanning.com/programs/ncdf_browser.zip If not, the source code for ncdump is in C, and is part of the standard netCDF source distribution in the ncdump/ subdirectory of either the netCDF-3.6.3 or netCDF-4.0 distribution (the ncdump source is the same in both cases). The version of ncdump that was part of netCDF-3.6.2 was simpler, because it didn't deal with the new datatypes in netCDF-4. Depending on what kind of platform you are running on, you may be able to get a pre-built netCDF binary package that has a working ncdump program all ready to use, without compiling anything. For existing binary distributions of netCDF, see: http://www.unidata.ucar.edu/netcdf/binaries.html Probably version 3.6.1 or any version after would work OK. --Russ --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: YEU-451918 Department: Support netCDF Priority: Normal Status: Closed