CDO

Dear all,
I have a similar situation,

I have ICON global data, I managed to interp all to lon/lat except the invariant package.

I have the source_grid, the target_grid and the weights. It gives me a constant error :
"
cdo remap (Warning): Reference to horizontal grid not available!

cdo remap (Abort): Reference to source grid not found!
"
The command I run is
cdo -f grb2 remap,target_grid_world_025.txt,weights_icogl2world_025.nc -setgrid,icon_grid_0026_R03B07_G.nc ICON_iko_invar_package_world_2018011800.grib2 temp.grib2

Any help will be much appreciated
Regards
J