def GetErrorMessage(self, node):
		message = super(ItemUpdaterWithChildren, self).GetErrorMessage(node)
		childrenErrorCount = node.childrenErrorCount
		if childrenErrorCount:
			childrenMessage = "- There are %d errors in children nodes" % node.childrenErrorCount
			if message:
				return '\n'.join( (message, childrenMessage) )
			else:
				return childrenMessage
		else:
			return message