diff --git a/colorbleed/plugins/maya/publish/validate_setdress_namespaces.py b/colorbleed/plugins/maya/publish/validate_setdress_namespaces.py
index 90246c216c..1eda02cf74 100644
--- a/colorbleed/plugins/maya/publish/validate_setdress_namespaces.py
+++ b/colorbleed/plugins/maya/publish/validate_setdress_namespaces.py
@@ -1,19 +1,29 @@
 import pyblish.api
-from collections import defaultdict
+import colorbleed.api
 
 
 class ValidateSetdressNamespaces(pyblish.api.InstancePlugin):
-    """Ensure namespaces are not nested"""
+    """Ensure namespaces are not nested
+
+    In the outliner an item in a normal namespace looks as following:
+        props_desk_01_:modelDefault
+
+    Any namespace which diverts from that is illegal, example of an illegal
+    namespace:
+        room_study_01_:props_desk_01_:modelDefault
+
+    """
 
     label = "Validate Setdress Namespaces"
     order = pyblish.api.ValidatorOrder
     families = ["colorbleed.setdress"]
+    actions = [colorbleed.api.SelectInvalidAction]
 
     def process(self, instance):
 
-        self.log.info("Checking namespace for %s", instance.name)
+        self.log.info("Checking namespace for %s" % instance.name)
         if self.get_invalid(instance):
-            self.log.error("Nested namespaces found")
+            raise RuntimeError("Nested namespaces found")
 
     @classmethod
     def get_invalid(cls, instance):
@@ -21,15 +31,9 @@ class ValidateSetdressNamespaces(pyblish.api.InstancePlugin):
         from maya import cmds
 
         invalid = []
-
-        namspace_lookup = defaultdict(list)
         for item in cmds.ls(instance):
-            namespace, node = item.rsplit(":", 1)[0]
-            namspace_lookup[namespace].append(node)
-
-        for namespace, nodes in namspace_lookup.items():
-            parts = [p for p in namespace.split(":") if p != ""]
-            if len(parts) > 1:
-                invalid.extend(nodes)
+            item_parts = item.split("|", 1)[0].rsplit(":")
+            if len(item_parts[:-1]) > 1:
+                invalid.append(item)
 
         return invalid