> Hi, I don't know if this is the right place or if you can help at all... > > I am running a fairly standard large atmospheric program (CMAQ), which has > run fine many times, but is now crashing with a netCDF-related error > message: > > ncendef: Error putting netCDF file into data mode. > netCDF error number -62 processing file "S_CGRID" > NetCDF: One or more variable sizes violate format constraints > > This is using Portland Group Fortran. > > Output files are very large, but the program run successfully wrote a 60-GB > output. > > The file that causes it to crash has the following dimensions: > > 255 x 50 x 218 x236 (= 655,962,000) > > Is there any way to modify netCDF to prevent this error? (Allow larger > limits, etc.)? > > Since this is a 'canned' program, it will be very hard to change the code. > > Please let me know if anything can be done about this. > > Sandy Sillman 769-0359 > > > ----------------------------------------------------- > Sanford Sillman (Sandy) > Department of Atmospheric, Oceanic and Space Sciences > 2455 Hayward Street, Room 1541C SRB > University of Michigan, Ann Arbor MI 48109-2143 (USA) > > PHONE: 734-763-4217 FAX: 734-936-0503 (best) or 734-764-4585 > E-MAIL: address@hidden > WEB SITE: http://www-personal.umich.edu/~sillman > ----------------------------------------------------- > > Have you recently increased your resolution? The error that you are getting indicates that you are trying to create a variable that does not fit in the constraints of the classic netCDF format (see http://www.unidata.ucar.edu/software/netcdf/docs/netcdf.html#Classic-Limitations). The answer is to switch to a different netCDF format. (This is transparent to reading programs, as long as they have a recent enough version of the netCDF library.) The different binary formats are explained here: http://www.unidata.ucar.edu/software/netcdf/docs/netcdf-tutorial.html#Versions To change the format you must find the nf_create call and change the cmode flag. For more info see: http://www.unidata.ucar.edu/software/netcdf/docs/netcdf-f90/NF90_005fCREATE.html#NF90_005fCREATE or http://www.unidata.ucar.edu/software/netcdf/docs/netcdf-f77/NF_005fCREATE.html#NF_005fCREATE. Good luck, Ed Ticket Details =================== Ticket ID: WOK-766024 Department: Support netCDF Priority: Critical Status: Closed
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.