Thanks for the reply Paul.
At present we are sending large number of tags with different time stamps , appended in an XML structure and sending the whole structure to the Historian and getting the response in some XML structure. Now we are trying to do the same thing with Pco query but i guess we need to call the query again and again for different time stamp as its not possible to send the whole structure to Historian via Pco and get the response in one hit for all the tags.
