CDO

Hi,

I'm trying to convert a .grb file to .nc file.

The cdo version I have is:

Climate Data Operators version 1.9.10 (https://mpimet.mpg.de/cdo)
System: x86_64-pc-linux-gnu
CXX Compiler: g++ -g -O2 -fopenmp -pthread
CXX version : g++ (GCC) 8.2.0
C Compiler: gcc -g -O2 -fopenmp -pthread -pthread
C version : gcc (GCC) 8.2.0
F77 Compiler: gfortran -g -O2
F77 version : GNU Fortran (GCC) 8.2.0
Features: 251GB 64threads C++14 OpenMP45 Fortran PTHREADS HDF5 NC4/HDF5/threadsafe OPeNDAP UDUNITS2 SSE2
Libraries: HDF5/1.10.5
Filetypes: srv ext ieg grb1 grb2 nc1 nc2 nc4 nc4c nc5
     CDI library version : 1.9.10
 cgribex library version : 1.9.5
 ecCodes library version : 2.21.0
  NetCDF library version : 4.7.3 of Jan 31 2020 12:07:41 $
    hdf5 library version : 1.10.5 threadsafe
    exse library version : 1.4.2
    FILE library version : 1.9.1

Whenever I try:

cdo -r -f nc selvar,var182 input.grb test.nc

it returns the following error:

Warning (gribUnzip): Decompression disabled, szlib not available!

Error (grbUnzipRecord): Decompression problem!

After some digging I found out the szlib is not mainted anymore, and that ECCODES should work instead. Is there a way of specifying the library to decompress? I'd prefer to avoid downloading szlib and working with the packages I already have (ECCODES, cfgrib, etc) as I work on an external cluster without admin rights.