CDO

I have a netcdf file which contains daily temperature data in 464 x 201 gridpoints from 01.01.1961 to 31.12.1961. In some days the data are missing in each grid points. The missing values are originaly denoted by NaN but they are changed by:

cdo –b F64 setmissval,-999 sample0.nc sample.nc

The cdo infon sample.nc operator gives the following result:

ta@beata-HP-Z420-Workstation:~/Documents/Bias_correction$ cdo infon sample2.nc
    -1 :       Date     Time   Level Gridsize    Miss :     Minimum        Mean     Maximum : Parameter name
     1 : 1961-03-01 00:00:00       0    93264   93264 :                     nan             : t             
     2 : 1961-03-02 00:00:00       0    93264   93264 :                     nan             : t             
     3 : 1961-03-03 00:00:00       0    93264   93264 :                     nan             : t             
     4 : 1961-03-04 00:00:00       0    93264    1452 :     -25.038      3.1817      23.797 : t             
     5 : 1961-03-05 00:00:00       0    93264    1452 :     -22.806      2.9417      22.780 : t             
     6 : 1961-03-06 00:00:00       0    93264    1452 :     -20.421      2.3351      19.113 : t

When I convert the sample.nc to sample.grb2 by :

cdo –b F32 –f grb2 copy sample.nc sample.grb2

I get the following error message:

GRIB_API ERROR   :  unable to set double array codedValues (Unable to code a field without values)

I tried to fill these values by:

cdo fillmiss sample.grb2 sample2.grb2

but it does not solve this error. How could I fill these nan grid to avoid this error message? I would appreciated if someone heped me!