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I figured out my mistake. I now have ncgen regenerating a dumped file as expected. Kevin Havener -----Original Message----- From: Dave Allured - NOAA Affiliate [mailto:dave.allured@xxxxxxxx] Sent: Monday, January 23, 2017 2:28 PM To: HAVENER, KEVIN F GS-12 USAF ACC 14 WS/WXED <kevin.havener@xxxxxxxxx> Cc: netcdfgroup@xxxxxxxxxxxxxxxx Subject: Re: [netcdfgroup] ncdump, then ncgen Ncdump followed by ncgen generally works fine for me. Try using plain ncgen, rather than ncgen3. Also try explicitly specifying the ncgen option to select netcdf-3 file format. I recall that the default output format changed occasionally with different versions of ncgen, so that might be your problem. Also remember to use -p9,17 with ncdump, if you want to preserve full precision from the original numeric values. Also use the -s option with ncdump, to get the correct special metadata for all advanced netcdf formats (64-bit, netcdf-4, and netcdf4-classic). --Dave On Mon, Jan 23, 2017 at 6:56 AM, HAVENER, KEVIN F GS-12 USAF ACC 14 WS/WXED <kevin.havener@xxxxxxxxx <mailto:kevin.havener@xxxxxxxxx> > wrote: If I understand correctly, I should be able to ncdump a netcdf to text (CDL) then ncgen it back to a valid netcdf file. I tried this on a seemingly valid netcdf3 file and ncgen3'd it, but the new file was not in any way like the old one. In fact, it didn't even seem to be a valid netcdf3 any longer--the file magic was incorrect. Did I completely misunderstand the capabilities of the two programs? Or did I just not understand how to do the process correctly? Kevin Havener, DAFC, 14WS/WXED
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