Ah, ok. I will close the bug report. Any idea why ncap2 cannot write into an existing netcdf-4 file? Adding variables to an existing file is a rather nice functionality! On 3/25/19 3:22 PM, Dave Allured - NOAA Affiliate wrote: > Sourish, > > It turns out this is merely a usage problem. Your original ncap2 > command is missing an output file name, where one is required in this > scenario. Ncap2 is not allowed to add a new variable to the input > file, if the format is netcdf4. Please see the third paragraph in > ncap2 documentation on line. > > I was misled by inaccurate error messages from your older version of > ncap2. Sorry about the extra noise about alternate causes. It is > ironic that the latest ncap2 version 4.7.9 on my system gives a > perfect diagnosis: > > > ncap2 -L 6 -4 -h -A -sncap2 -L 6 -4 -h -A -s > 'co2_flux_natural=3Dbio_flux_opt+fire_flux_imp+ocn_flux_opt' > guineapig.nc > <http://secure-web.cisco.com/10RlVLKLa7G956P7rbaD_dY1gBsiFnKg6fENIGjYr5pP2AdhDv4CF1nXLXqvu49OknGXL4CP8noBos5kefl_M3EZ1jg8A8fZzV5I1wa18xe_3aKf_1wx6zmp_6xVr2Wddg8qiEvPy341j7gecmiNgQtXz_CbdqjKIarLXLIRsCfz_mh0qB_VMgYWV7D-sQC1VbXkJybsTwdslLOETmKFiTmYf1QuqEn-143Wx78yzRYbHrmKUZVhxm69W-uAsfnro576aZvJeBEbequ9BudKgBEAvJNkKE6xNGC2bKAFttejq7R8BPRFlNvmGNTHDwL5hD6H3KCHxnBzYH52UMI-QrplAwYHF6914-urhLIndTG-LNxtzw_k-pQFAGEl1i6J9QEKgXinQdHaOC00UVSPZb-LWQZKui2eUKXaABWxwhhNt-9ggnUEAhit18niHb_8q/http%3A%2F%2Fguineapig.nc> > > > ncap2: ERROR No output file specified with netCDF4 input file. When no > output file is specified, ncap2 tries to write directly to the input > file but this can only work with netCDF3 not netCDF4 input files. > Please specify an output file distinct from the input file and re-try. > > I think you can close the NCO bug report. > > --Dave > > > On Mon, Mar 25, 2019 at 2:48 PM Sourish Basu > <Sourish.Basu@xxxxxxxxxxxx <mailto:Sourish.Basu@xxxxxxxxxxxx>> wrote: > > Charlie, > > I've narrowed down the exact problem. It seems that ncap2 can > append to > an uncompressed file, or write a compressed variable to a new > file, but > cannot append to a file with compressed variables. I've filed a bug > report with details at https://sourceforge.net/p/nco/bugs/111/. > > -Sourish > > On 3/25/19 8:31 AM, Charlie Zender wrote: > > Souresh, > > > > See http://nco.sf.net#help for NCO issues. > > > > FWIW, this command works fine for me with your file: > > > > ncap2 -L 6 -4 -h -A -s > > 'co2_flux_natural=bio_flux_opt+fire_flux_imp+ocn_flux_opt' > > guineapig.nc > > <http://secure-web.cisco.com/10RlVLKLa7G956P7rbaD_dY1gBsiFnKg6fENIGjYr5pP2AdhDv4CF1nXLXqvu49OknGXL4CP8noBos5kefl_M3EZ1jg8A8fZzV5I1wa18xe_3aKf_1wx6zmp_6xVr2Wddg8qiEvPy341j7gecmiNgQtXz_CbdqjKIarLXLIRsCfz_mh0qB_VMgYWV7D-sQC1VbXkJybsTwdslLOETmKFiTmYf1QuqEn-143Wx78yzRYbHrmKUZVhxm69W-uAsfnro576aZvJeBEbequ9BudKgBEAvJNkKE6xNGC2bKAFttejq7R8BPRFlNvmGNTHDwL5hD6H3KCHxnBzYH52UMI-QrplAwYHF6914-urhLIndTG-LNxtzw_k-pQFAGEl1i6J9QEKgXinQdHaOC00UVSPZb-LWQZKui2eUKXaABWxwhhNt-9ggnUEAhit18niHb_8q/http%3A%2F%2Fguineapig.nc> > foo.nc > > <http://secure-web.cisco.com/1I1txVKr87Y-cESVTbOceougUk_I-uEvchMq-XjuTgkzLVkmNmHRdBXGUcWIBI-l3vueaCg0QfsTmctDAWMyOl7amZZVLVAsrBkxB-tEdQ7GziH7ruBuo0DdBK_eiTkrNlec4xZZP5GuP1k4E6Ow64OcipXTJvxPS_uIOggvo1dZJbFcB89x9X2_5kcFrKQWkNqTcwryaUiFYY4_DCXRhBdBpDFfuCT0QdWYsjBl6a_fCoTh3tpJXpmLrSH0w0vgEHeP1GtbfhdJ6ANQYie5qhbu12YMFHl-0XSBdNYmSu2ugeW8b85X-g4Cs1EUpBmxT1SemO1shx1QlIvIwQpu-wNQnTlIq7tH3fZ6USWlt-cr9ixcMDFTW1QfBJ1z4SOBOgSi4xL--SmDu9aBdZ5H2rgSDGvF7gNkUWpuXDY32q-oSEUWzuHR06c9m72Wuu2lc/http%3A%2F%2Ffoo.nc> > > > > The -A is superfluous, and perhaps you omitted the output filename. > > If not, please move this thread to the site above. > > > > Charlie >
Attachment:
signature.asc
Description: OpenPGP digital signature
netcdfgroup archives: