Labview 8.2 - Notifiers and multiple loops

[MikeRendall]

Hi.

I have a question with Labview 8.2 and notifiers.  I have a front panel object that has some controls.  These controls are serviced by a single while loop and when a user makes a change a notifier is sent to other concurrently running loops to inform of the change.  I.e., I have a shutdown button, which services multiple while loops, however, I cannot terminate the program immediately, on this shutdown command certain actions must be performed - hence the notifier to warn all running loops to shutdown safely.

I have been told that as long as notifiers have the same name, you do not need to wire them to the multiple loops, however, this is not working.  Can I have multiple loops, with loops within them that can respond to external commands by notifiers?  or should another method be used?

Mike

[MikeRendall]

Just to clarify, The notifier demultiplexer.vi that is on the examples directory shows that you can have multiple loops with multiple generations of the 'obtain notifier vi' however, when i try it, I get an 'invalid reference' unless all obtain notifiers have different names.

Mike

[TCPlomp]

I have no issues running 'examples\general\notifier.llb\Notifier Demultiplexer.vi' it acts as aspected.
Could you post your not-working VI?

EDIT: Did you connect a false-case to the 'create new?' input of the obtain notifier? If you do so you must make sure that the notifier is created before calling the obtain notifier. This is a technique used to control the existence of a module.

Ton

Message Edited by TonP on 10-02-2006 01:06 PM

[MikeRendall]

Hi.

If you put the 'retain wire values' on, then run the example, stop the code, then view the notifier wire it will show 'invalid ref num'.    However, I think I am on my way to sorting the problem, i have changed the timeout values in the 'wait for' section at it appears to have gained a lot more functionality.

Mike

[TCPlomp]

Yeah that's strange,

but it works right?

Ton