Added warnings and error handling related to duplicate point names in…

… device registries.

services/core/PlatformDriverAgent/platform_driver/driver.py

@@ -167,7 +167,13 @@ def setup_device(self):
 
         self.heart_beat_point = config.get("heart_beat_point")
 
-
+        # Check for duplicate names in registry entries and warn if this will cause rows to be skipped.
+        point_names = [r['Volttron Point Name'] for r in registry_config]
+        seen = set(point_names)
+        duplicates = [n for n in point_names if n not in seen or seen.remove(n)]
+        if duplicates:
+            _log.warning(f'Duplicate point names detected in registry file for {self.device_path}. '
+                         f'Only the last registry row will be used for points with names: {set(duplicates)}')
 
         self.interface = self.get_interface(driver_type, driver_config, registry_config)
         self.meta_data = {}

volttron/platform/web/topic_tree.py

@@ -166,6 +166,9 @@ def from_store(cls, platform, rpc_caller):
             registry_config = registry_config if kwargs else registry_config.get(timeout=5)
             for pnt in registry_config:
                 point_name = pnt.pop('Volttron Point Name')
-                n = device_tree.create_node(point_name, f"{d}/{point_name}", parent=d, data=pnt)
-                n.segment_type = 'POINT'
+                try:
+                    n = device_tree.create_node(point_name, f"{d}/{point_name}", parent=d, data=pnt)
+                    n.segment_type = 'POINT'
+                except DuplicatedNodeIdError:
+                    _log.warning(f'Duplicate Voltron Point Name ({point_name}) found in registry: {reg_cfg_name}.')
         return device_tree