retrieving missing data from netcdf files

Question

I have a netcdf file (prod.nc) that contains timeseries from a molecular dynamics simulation (Amber force field, OpenMM engine, parmed netCDFReporter). The netCDFReporter had some problems and a result the number of frames in the netcdf file is zero. Given below is the ncdump for the file:

$ncdump -h prod.nc
netcdf prod {
dimensions:
        frame = UNLIMITED ; // (0 currently)
        spatial = 3 ;
        atom = 20504 ;
variables:
        char spatial(spatial) ;
        float time(frame) ;
                time:units = "picosecond" ;
        float coordinates(frame, atom, spatial) ;
                coordinates:units = "angstrom" ;

// global attributes:
                :Conventions = "AMBER" ;
                :ConventionVersion = "1.0" ;
                :application = "AmberTools" ;
                :program = "ParmEd" ;
                :programVersion = "3.4.0+11.g1be8ca0f" ;
                :title = "ParmEd-created trajectory" ;
}

However, the netcdf file has a non-zero size (that increases linearly with the number of frames stored) which implies that it certainly has the data written into it. I tried a number of tools (netCDF4, scipy netcdf reader, xarray) to access the missing data but have not succeeded.

I have two questions:

1. Does the file contain the real data or is it just the _Fillvalues?

2. If the former, is there a way to retrieve the data?

I am desperately looking to salvage near 3 microseconds of simulation data which would take more than 2 months to generate. I would greatly appreciate if anyone can provide me some insight into this problem.