Cancellation of registration user stored in the shift register event generates the error 1 if Subvi runs intermittently

Hello

I'm trying to understand the behavior of the attached excerpt from a larger overall vi functional.

In a State, I'm generating a user event and in a State later unsubscribe from the event and destroy it.

Now, if I went through the VI together in one step (i.e., step through events? set to FALSE), the VI runs without generating an error. However, if I run the VI by intermittent and output after each execution of the loop, the vi generates error 1. Why is it so? Please notify. Thank you.

Peter

Why are you registration and deregistration of events user, but you have no event structure in your VI who use them?

When you run events, probaby the event you registered disappears when your VI stops running.  If you were able to keep your VI in the foreground running, then the life of the event would persist.

The event number still exists in the uninitialized shift register, but it does not say more once your high level VI stops and you get the error 1.

If it was really a global functional VI, you would terminals connected to the connector table in your VI, you would call this as a Subvi as part of a main VI and life event would persist and you wouldn't mistake 1.

Tags: NI Software

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