# the tagtype instance is assumed to exist, just check that
if not TagTypes(self.api,{'tagname':tagname}):
raise PLCInvalidArgument,"No such TagType %s"%tagname
node_tags=NodeTags(self.api,{'tagname':tagname,'node_id':node['node_id']})
if not node_tags:
# the tagtype instance is assumed to exist, just check that
if not TagTypes(self.api,{'tagname':tagname}):
raise PLCInvalidArgument,"No such TagType %s"%tagname
node_tags=NodeTags(self.api,{'tagname':tagname,'node_id':node['node_id']})
if not node_tags: