Using HRRRX for LBCs

When trying to use HRRRX for LBCs, the following error presents itself:

ERROR:
  From script:  "exregional_make_lbcs.sh"
  Full path to script:  "/scratch2/NCEPDEV/fv3-cam/Perry.Shafran/ufs-srweather-app/regional_workflow/scripts/exregional_make_lbcs.sh"
External-model-dependent namelist variables have not yet been specified
for this external model:
  EXTRN_MDL_NAME_LBCS = "HRRRX"
Exiting with nonzero status.

 

However, in valid_param_vals.sh it shows:

valid_vals_EXTRN_MDL_NAME_LBCS=("GSMGFS" "FV3GFS" "RAPX" "HRRRX")

Is this in fact a valid option?