CDO

Dear All
Please find two attached netcdf file model.nc and temp_seltime.nc. Both are on a generic grid as lon/lat information is defined as two dimensional parameter. Both the data are from RegCM coupled with CLM. model.nc contains temperature at 2m height wgich is part of Surface output of RegCM while temp_seltime.nc contains soil temperature from land surface model (community land model).
cdo griddes model.nc provides #

1. gridID 15 #
   gridtype = curvilinear
   gridsize = 66490
   xname = xlon
   xlongname = Longitude on Cross Points
   xunits = degrees_east
   yname = xlat
   ylongname = Latitude on Cross Points
   yunits = degrees_north
   xsize = 305
   ysize = 218
   xvals = 31.4082661 31.6517029 31.8952446 32.1388931 32.3826485 32.6265068 32.870472
   33.1145363 33.3587074 33.6029778 33.8473511 34.0918236 34.3363991 34.5810699
   34.8258438 35.0707169 35.3156853 35.5607491 35.805912 36.0511703 36.296524
   36.5419731 36.7875137 37.0331497 37.2788773 37.5246964 37.770607 38.0166092
   38.2627029 38.5088806 38.7551537 39.0015106 39.2479553 39.4944878 39.7411041
   39.9878082 40.2345963 40.4814682 40.7284241 40.9754639 41.2225838 41.4697838
   41.7170677 41.9644279 42.2118721 42.4593925 42.7069893 42.9546661 43.2024193
   43.4502449 43.6981506 43.9461288 44.1941795 44.4423065 44.6905022 44.9387741
   ...............................
   while cdo griddes temp_seltime.nc shows #
2. gridID 2 #
   gridtype = generic
   gridsize = 66490
   xname = x
   xunits = degrees
   yname = y
   yunits = degrees
   xsize = 305
   ysize = 218

My question is why it is so? I saw cdo remapbil is working on model.nc but
cdo remapbil,EIN5.soilT.0-7cm.JJASmean.1982-2016.remap.nc temp_seltime.nc ss.nc
cdo remapbil (Abort): Unsupported grid type: generic
Please reply at the earliest where I did mistake.
Any sort of suggestion will be appreciable.
Thanking you,
Best
Suman