Please note some important changes in this release (v2.41.0) of ecCodes:

• The following C API functions are deprecated and will be removed in a future release:

  codes_string_list* codes_grib_util_get_param_id(const char* mars_param); codes_string_list* codes_grib_util_get_mars_param(const char* param_id);

• The CMake option ENABLE_TIMER is deprecated and will be removed in the next release
•  

Please note: There is a new webpage for the Migration to GRIB2: Migration to GRIB2
This webpage also includes a section where changes in the parameter encodings for the coming ecCodes versions are documented: Changes in the parameter encodings