Error 11 with TCP Listen.vi and named service

Question

I am using TCP Listen.vi with a named service so my Real-Time application can act as a TCP server without the clients needing to know the specific port.  I am using LabVIEW 8.5.
I am getting Error 11 from TCP Listen.vi if no client has connected within a certain amount of time.  I have traced the problem down to the TCP Listen Internal List.vi inside Internecine Avoider.vi in TCP Listen.vi.  I think I have found a bug in this vi.
What is happening is that the Search function of TCP Listen Internal List.vi is not finding the named service, so new listeners continue to be created until there are too many open.  See the attached picture.  I think the circled function should be "not equal" instead of "equal".
Has anyone run across this problem before?
Thanks,
Cherie
Attachments:
TCP Listen.PNG ‏39 KB

Answer 1

Cherie,
Let us assume that al listener for your port number and name is not yet created and you have put the TCP Listen in a loop.
1st Iteration:
Searching the internal list will not find a name or port and hence it will create a connection and if successful will insert the port number and name to  Internal List.
2nd Iteration onwards:
It will find the previous connection, provided you are still passing the  same port number. If in the second iteration the port number changes, then what you say may happen
Will it be possible for you to post the TCP VI you have in RT?
That said...I don't get why that compare with zero is required? If port number was 0 in the first iteration then anyway after creating the listener, the new port number will be updated to the list along with the service name, isn't it?
Message Edited by kikiduu on 09-06-2008 08:50 AM
"A VI inside a Class is worth hundreds in the bush"
യവന്‍ പുലിയാണു കേട്ടാ!!!