Update error

Co-authored-by: barneydobson <barnaby.dobson1@gmail.com>

wsimod/nodes/land.py

@@ -410,7 +410,7 @@ def apply_overrides(self, overrides = Dict[str, Any]):
         elif isinstance(content, dict):
             self.data_input_dict = content
         else:
-            print('ERROR: not recognised format for data_input_dict')
+            raise ValueError(f'{content.__class__} is not a recognised format for data_input_dict')
 
         super().apply_overrides(overrides)