fix: reinstate nested try/catch statements

src/read.jl

@@ -127,47 +127,48 @@ function read_demand_flexibility(filepath)::DemandFlexibility
         demand_flexibility["rolling_balance"] = true
 
         # Try loading the demand flexibility parameters
+        demand_flexibility_parameters = DataFrames.DataFrame()
         try
             demand_flexibility_parameters = CSV.File(
                 joinpath(filepath, "demand_flexibility_parameters.csv")
             ) |> DataFrames.DataFrame
             println("...loading demand flexibility parameters")
+
+            # Create a dictionary to hold the error messages relevant to loading the 
+                # demand flexibility parameters
+            demand_flexibility_params_errs = Dict()
+            demand_flexibility_params_errs["duration"] = (
+                "The demand flexibility duration parameter is not defined. Will "
+                * "default to nothing."
+            )
+            demand_flexibility_params_errs["enabled"] = (
+                "The parameter that indicates if demand flexibility is enabled is not "
+                * "defined. Will default to being enabled."
+            )
+            demand_flexibility_params_errs["interval_balance"] = (
+                "The parameter that indicates if the interval load balance constraint "
+                * "is enabled is not defined. Will default to being enabled."
+            )
+            demand_flexibility_params_errs["rolling_balance"] = (
+                "The parameter that indicates if the rolling load balance constraint "
+                * "is enabled is not defined. Will default to being enabled."
+            )
+
+            # Try assigning the different demand flexibility parameters from the file
+            for k in keys(demand_flexibility_params_errs)
+                try
+                    demand_flexibility[k] = demand_flexibility_parameters[1, k]
+                catch e
+                    println(demand_flexibility_params_errs[k])
+                end
+            end
         catch e
             println("Demand flexibility parameters not found in " * filepath)
             println(
                 "Demand flexibility parameters will default to allowing demand "
                 * "flexibility to occur."
             )
         end
-
-        # Create a dictionary to hold the error messages relevant to loading demand 
-            # flexibility parameters
-        demand_flexibility_params_errs = Dict()
-        demand_flexibility_params_errs["duration"] = (
-            "The demand flexibility duration parameter is not defined. Will default to "
-            * "nothing."
-        )
-        demand_flexibility_params_errs["enabled"] = (
-            "The parameter that indicates if demand flexibility is enabled is not "
-            * "defined. Will default to being enabled."
-        )
-        demand_flexibility_params_errs["interval_balance"] = (
-            "The parameter that indicates if the interval load balance constraint is "
-            * "enabled is not defined. Will default to being enabled."
-        )
-        demand_flexibility_params_errs["rolling_balance"] = (
-            "The parameter that indicates if the rolling load balance constraint is "
-            * "enabled is not defined. Will default to being enabled."
-        )
-
-        # Try assigning the different demand flexibility parameters from the input file
-        for k in keys(demand_flexibility_params_errs)
-            try
-                demand_flexibility[k] = demand_flexibility_parameters[1, k]
-            catch e
-                println(demand_flexibility_params_errs[k])
-            end
-        end
     end
 
     # Convert Dict to NamedTuple