parallel NetCDF: One or more variable sizes violate format constraints

[Felicity Graham]

Hello,

I'd like to use parallel netcdf in C to read the only variable from a 16GB netcdf file and perform some operations.

The file format is classic, and was created with netcdf 3.6.3. I'm using openmpi 1.6.3 and pnetcdf 1.4.1.

I've tested on a separate netcdf-4 formatted file, and the reading works fine, but on the classic file, I get the error  NetCDF: One or more variable sizes violate format constraints when I try to open the file (ncmpi_open).

A stripped down version of the C code is below.

Your help is much appreciated.

Cheers,
Felicity



#include <stdio.h>

#include <mpi.h>

#include <pnetcdf.h>


#define FILE_NAME "<path_to_file>/hf_topog.nc"

#define VAR_NAME "hf_topog"


#define CHECK_ERR {\

    if (err!=NC_NOERR) {\

        printf("Error at line=%d: %s\n", __LINE__, ncmpi_strerror(err));\

        goto fn_exit;\

    }}


int main(int argc, char **argv)

{

  int err, varid, ncid;

  float * topog_in;


  MPI_Init(&argc,&argv);


  err = ncmpi_open(MPI_COMM_WORLD, FILE_NAME, NC_NOWRITE, MPI_INFO_NULL, &ncid);

  CHECK_ERR;


  err = ncmpi_close(ncid);

  CHECK_ERR;


fn_exit:

  MPI_Finalize();


  return 0;

}




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