use process_piecewisefuelusage so that THERM_COMMIT_PWFU can be used …

…in function load_multi_fuels_data

src/load_inputs/load_generators_data.jl

@@ -292,7 +292,10 @@ function load_multi_fuels_data!(inputs_gen::Dict, setup::Dict, path::AbstractStr
 		end
 	end
 	# do not allow the multi-fuel option when piece-wise heat rates are used
-	THERM_COMMIT_PWFU = intersect(gen_in[gen_in.THERM.==1,:R_ID], gen_in[gen_in.HAS_PWFU,:R_ID])
+	if setup["UCommit"] > 0
+		process_piecewisefuelusage!(inputs_gen, scale_factor)
+	end
+	THERM_COMMIT_PWFU = inputs_gen["THERM_COMMIT_PWFU"]
     # segemnt for piecewise fuel usage
     if !isempty(THERM_COMMIT_PWFU)
 		error("Multi-fuel option is not available when piece-wise heat rates are used. Please remove multi fuels to avoid this error.")