refactor(mfmodel.py): add error trap for missing setup_grid input; fi…

…x error message in mf6model.py

mfsetup/mf6model.py

@@ -405,7 +405,7 @@ def create_lgr_models(self):
             last_refined_layer = max(np.where(is_refined > 0)[0])
             consecutive = all(np.diff(is_refined)[:last_refined_layer] == 0)
             if (is_refined[0] != 1) | (not consecutive):
-                raise ValueError("Configuration input: layer_refinement must"
+                raise ValueError("Configuration input: layer_refinement must "
                                  "include consecutive sequence of layers, "
                                  "starting with the top layer.")
             # check the specified DIS package input is consistent

mfsetup/mfmodel.py

@@ -1417,6 +1417,12 @@ def setup_grid(self):
             self._modelgrid.cfg = self.cfg['grid']
         else:
             kwargs = get_input_arguments(cfg, setup_structured_grid)
+            if not set(kwargs.keys()).intersection({
+                'features_shapefile', 'features', 'xoff', 'yoff', 'xul', 'yul'}):
+                raise ValueError(
+                    "No features_shapefile or xoff, yoff supplied "
+                    "to setup_grid: block. Check configuration file input, "
+                    "including for accidental indentation of the setup_grid: block.")
             self._modelgrid = setup_structured_grid(**kwargs)
             self.cfg['grid'] = self._modelgrid.cfg
             # update DIS package configuration