I am a newbie to Labview. I am trying to write some vi to view and write data to Mdsplus. I have downloaded Mdsplus (labview), and can find the Mdsplus functions, like mdsconnect, mdsput, ect, in the Call Library Function vi. But I have no ideal of how to use it. I tried to use Mdsconnect function to connect to some machine, but it always gives me an error message like, Labview: An exception occurred within the external code called by a call library function node....... I was searching for help documents on the internet, but couldn't find anything useful. Could you please help me for this problem? If you have any example of such vi, that would be very helpful. I am using Labview 8. I would greatly appreciate your help! Looking forward for your reply.