Stop VI that was called by reference

[Sonnenkind]

Hi,

I have the following problem: I have a main-VI that is starting a sub-VI using the "Open VI Reference" and an invoke node to start a VI. The option "Wait for end of VI" is set to false. Is there a possibility to automatically stop the sub-VI, when the main-VI is stopped? Or do I have to give the sub-VI a reference to a boolean variable, that shows, if the main-VI is running.

Regards,

Frank

[waldemar.hersacher]

Hi Frank,

you can use the AbortVI Invoke node to stop the execution of a VI. Be aware this will be an immediate stop and the VI has no chance to do any cleanup tasks. Otherwise you need any synchronisation mechanism (occurence, notifier, queue) to inform your Sub-VI to stop.

[falkpl]

A good way to do this is through a synchronization mechanism like queue, here you can pass messages to the subvi.  Also a using a reference to the calling vi you can check its run state.