 		 */
 		public function getBinNames():Array
 		{
-			if (internalObject)
+			if (internalObject && columnJuggler.target)
 				return (internalObject as IBinningDefinition).getBinNames();
 			return [];
 		}

		 */
		public function getBinClassifiers():Array
		{
			if (internalObject)
				return (internalObject as IBinningDefinition).getBinClassifiers();
			return [];
		}

			if (internalObject && column)
				(internalObject as IBinningDefinition).generateBinClassifiersForColumn(column);
			else
				asyncResultCallbacks.triggerCallbacks(); // bins are empty
		}
		
		/**
