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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Hi Andrew, You've run across a limitation in the number of simultaneously open groups permitted in netCDF-4. The groups documentation <http://www.unidata.ucar.edu/netcdf/docs/group__groups.html> says ... Encoding both the open file id and group id in a single integer currently limits the number of groups per netCDF-4 file to no more than 32767. Similarly, the number of simultaneously open netCDF-4 files in one program context is limited to 32767. I think both those limits should actually be 65535 (== 2**16 - 1), but in any case, your HDF5 file has 119254 groups, which is too many for netCDF-4 to handle. The only workaround I can think of would be to close some groups if you don't need to have them all open simultaneously. --Russ On Mon, Nov 17, 2014 at 8:14 AM, Andrew Dowsey < andrew.dowsey@xxxxxxxxxxxxxxxx> wrote: > Hi, > > I’m trying to create HDF5 files that can be read by NetCDF4 and I’ve run > into a problem in that nc_inq_grps seems to report some bad ids. ncdump > bails with this error too. h5dump works fine. The problem is deterministic > but I haven’t been able to figure out what causes it because slightly > different HDF5 files work fine. I have created a test file that has this > problem, which contains nothing but groups. It can be downloaded from > http://personalpages.manchester.ac.uk/staff/andrew.dowsey/test.h5 > > I am creating a new format for a type of instrument data we use, and for > flexibility I would like it to be writeable/readable both by HDF5 and > netCDF4 libraries. > > Any insight would be greatly appreciated! > > Kind regards, > Andy > > > *Andrew Dowsey PhD* > *Lecturer and CADET Bioinformatics Research Lead* > Institute of Human Development, The University of Manchester > > t: +44 161 701 0244 > f: +44 161 701 0242 > http://www.manchester.ac.uk/research/andrew.dowsey > > Centre for Advanced Discovery and Experimental Therapeutics (CADET) > Central Manchester University Hospitals NHS Foundation Trust > Oxford Road > Manchester M13 9WL > UK > > > _______________________________________________ > netcdfgroup mailing list > netcdfgroup@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ >
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