It would be helpful if you could give the URL to the tutorial. I have not been successful in finding "TCP ip intro".
Datasocket works like a bulletin board you would see if you were driving down the road. If something writes to the bulletin board (an advertiser), then your datasocket reader(you sitting in a car) can see the data. If your datasocket reader is doing something else like watching other traffic and several writes have taken place, only the most recent data is seen by the reader. This is because datasocket was lossy before buffered datasocket in LabVIEW 7.0 was introduced.
Before you can do any communication with datasocket, you have to start the datasocket server. If you think about it, how would datasocket read receive data if no b
ulletin board exists. (if you missed it, the bulletin board is the datasocket server).
There are two ways to create items (specifically called datasocket data items) on the datasocket server. Think of the the items as specific ads on a multiad bulletin board. You can create static items. This is rarely done and requires the use of Datasocket Server Manager. The other method is to dynamically create datasocket data items. I suspect this is what you are doing. When you first starting writing to the datasocket server the datasocket data item is created. At this point the reader will have something to read. The datasocket data item remains valid while all readers and writers to the datasocket server are active. When nothing is reading or writing (it could be just writing), the datasocket data item is removed. You can see this in action by going to the diagnostic page on the datasocket server.
I suspect the behavior you are seeing in 1 is related to the behavior described in
the above paragraph. I cannot say for sure because I do not have your code. I recommend using a shipping example for datasocket. They are found by going to the help menu of LabVIEW. These examples work.
