Hi, i'm sorry if i interrupt this thread,but when you mentioned about STM i have a question. i have STM newest version 2.0 library and labview 2009. when i connect a server and client it works fine without any problem. i should thank the people who has did this library,but found one bug on it,like whenever i remove the LAN connection that means STM read message in the server side which is suppose to give an error (66) , will not give any error saying the connection is lost. what is the reason behind this?if you have any idea then please tell how to go on with this.