Frozen screen during execution

[ebragafreitas]

Hi there,

I developed a VI to acquire pressure data from 48 sensors. During execution, the front panel freezes and the acquisition just stops. No error message appears and i just can interact with other objects, like graphs and buttons. Remember that the VI keep running, but the acqusition stucks. I'm using LabView 6.1. I'd apreciate if you could help me.

Thanks,

[altenbach]

We need to see the code!

Some things to look out for:

• An event structure that locks the front panel (the default!), but never completes.
• Don't set the VI priority to e.g.  timecritical, or user interactions are postponed.
• how is error handling?
• How does it communicate with the sensors?
• Are there any third party dll calls?
• ...

[ebragafreitas]

Here are the codes, take a look at them, please.

The labels are in portuguese, but it´s easy to understand cause the words are similar to the english ones.

The error handling shows only some warnings, like ''..vi recomended input is unwired". These warnings don´t affect the execution.

The sensors comunicate with the soft through 2 boards ni daq PCI E-6031 and PC1 E-6024, respectively.

What do you mean about third party dll calls?

[RavensFan]

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[ebragafreitas]

The codes.

[altenbach]

Sorry, troubleshooting from pictures is probably not possible in this case. Can you attach a real VI instead?

The code itself is much more complicated than needed, because there is a lot of repetitive code. Still, it would not explain a lockup.

[Ben]

Now that we have seen the code, two questions.

1) DId this application ever run correctly?

2) Have you tested your hardware using MAX?

Ben

[ebragafreitas]

Yes, how i said, the program runs correctly, but the acquisition stop some times (screen gets freeze).

And i've already tested the boards using measurement and automation explorer. They're OK.

[Ben]

Then use the Task Manager to see if another task is getting in the way of your application.

It would also be helpful if you put indicators on the outputs of all of your "AI" to see if an erro is returned.

Ben