Network Stream Error -314350

[Hahas]

Hello

I am trying to connect network streams from two different application to one other application.

Application A <> Application C
Application B <> Application C

I have created three test projects showing the problem. In this example I try to connect from Application A to Application B and from Application B to Application C.

It is working without problems, as long as the applications are running in the LV development environment. As soon as I execute the executables, only one application can connect, the other gets the error -314350.

(From https://labviewwiki.org/wiki/LabVIEW_Error_Code_Family:
LabVIEW: (Hex 0xFFFB3412) Another application is already streaming data to an endpoint in the context you specified. If you specified a context name in the reader name or writer name terminal of the endpoint, you must specify an unused context name. If you did not specify a context name, you must specify an unused context name by entering an endpoint URL in the reader name or writer name terminal.)

The following urls are used:
The url in Application A is //localhost:ScriptHandler/script1_out_writer (if in executable)
The url in Application B is //localhost:ScriptHandler/script2_out_writer (if in executable)

Can anybody help me to solve this issue?

Regards,
Hannes

NetWorkStream.zip

[hooovahh]

Crosspost

[Hahas]

Hello hooovahh,

I know, that this is a crosspost. But as I didn't get a solution there, I try it in this forum. 

Maybe an expert in this forum can help me.

Hannes

[dadreamer]

I would first increase the timeout input on the Create Network Stream node in ApplicationA.vi, so the value would be equal or higher than 160 ms, as I recall some problems related to the timeout being small: Timeout influence at Create Network Stream Endpoint Of course, it may be not your issue exactly, but worth trying anyway.

[hooovahh]

2 hours ago, Hahas said:

I know, that this is a crosspost. But as I didn't get a solution there, I try it in this forum. 

Maybe an expert in this forum can help me.

Oh I get that you're welcome to post it here, I just wanted to link there so anyone here can see the conversation on the subject that has already taken place.

[LogMAN]

I'm not familiar with network streams but the online help provides an example for your particular scenario (scroll to the very bottom): Specifying Network Stream Endpoint URLs - NI

Based on your code this works for me: Working Example.zip

Edit: To provide some more explanation:

Only one application can create endpoints in the default (empty) context "//localhost/".

Incidentally, this is also the default context when you create a writer endpoint by name. For example, writer endpoint "my_writer" is equivalent to "//localhost/my_writer".

In your particular example,

•  Application B creates a writer endpoint "ApplicationA_in_writer", which is equivalent to "//localhost/ApplicationA_in_writer".
  
   
• Application C creates a writer endpoint "ApplicationB_in_writer", which is equivalent to "//localhost/ApplicationB_in_writer".
  

And since only one application can use the default context, the error happens.

To create endpoints in separate contexts, you must specify the context in the endpoint name. For example, "//localhost:ApplicationB/ApplicationA_in_writer" and "//localhost:ApplicationC/ApplicationB_in_writer".

Edited May 10, 2023 by LogMAN
Explaining things

[Hahas]

Dear LogMan,

That's the solution! Many thanks!

Now everything is working fine 🙂

Hannes