CDO

I am using Remapbil function to regrid 1 Degree IMD Temperature file (MaxT_1951_2016.nc) to 0.5 Degree temperature file using following command :

cdo remapbil,grids.txt MaxT_1951_2016.nc Output.nc

I am getting various missing values in various grids, how it can be done so that I could get right result?
Is there any other way to regrid or remap the file so that proper result could be obtained?
I have attached picture that how data gap is there. Many grids have missing values.

Grid Information for my Input file MaxT_1951_2016.nc is as follows: #

1. gridID 1 #
   gridtype = lonlat
   gridsize = 961
   xsize = 31
   ysize = 31
   xname = lon
   xlongname = "longitude"
   xunits = "degrees_east"
   yname = lat
   ylongname = "latitude"
   yunits = "degrees_north"
   xfirst = 67.5
   xinc = 1
   yfirst = 7.5
   yinc = 1

Grid Information of Output file (Output.nc) is as follows: #

1. gridID 1 #
   gridtype = lonlat
   gridsize = 3844
   xsize = 62
   ysize = 62
   xname = lon
   xlongname = "longitude"
   xunits = "degrees_east"
   yname = lat
   ylongname = "latitude"
   yunits = "degrees_north"
   xfirst = 67.5
   xinc = 1
   yfirst = 7.5
   yinc = 1