I want to output the variable about surface forcing of BC in snow in CLM5, but I dont find it in 1.2.5. CTSM History Fields — ctsm release-clm5.0 documentation
But the variable "SNOBCFRCL" exsited in https://www2.cesm.ucar.edu/models/c.../doc/UsersGuide/history_fields_table_40.xhtml, when I add SNOBCFRCL to user_nl_clm (already set the -snicar_frc on in CLM_CONFIG_OPTS), the error occurred as

so how to output the radiative forcing of BC in snow in CLM5?
But the variable "SNOBCFRCL" exsited in https://www2.cesm.ucar.edu/models/c.../doc/UsersGuide/history_fields_table_40.xhtml, when I add SNOBCFRCL to user_nl_clm (already set the -snicar_frc on in CLM_CONFIG_OPTS), the error occurred as

so how to output the radiative forcing of BC in snow in CLM5?