Application pauses for up to 4 seconds at random places in processing loop.

[Chris.Osiecki]

My software ran over the weekend without a single hang up. I think I have found the problem. My utilization went up a bit because I'm not using the array optimizations the put in 8.5, but at least its stable. Now if they can figure out the problem and fix it in 8.5.2 🙂 Thank you to everyone who helped me with this. Its a pain to track down a problem for this long, but I did so many improvements to my program trying to figure it out, I would be very tempted to say it was worth it!

[Ben]

Could you please summarize what turned out to be the issue and what was the fix.

I'm glad you have something that serves your needs!

Ben

[Chris.Osiecki]

As far as I can tell, there is a bug or some glitch in 8.21, 8.5 and 8.5.1 that isn't in 8.20 that causes a vi to hang and CPU usage to spike. I moved back to 8.20 on the test system and I haven't had a single error since then.

[David_B]

Hi all,

I've verified all of the behavior that has been described here.  The spike in CPU usage is seen in LV 8.2.1, 8.5, and 8.5.1 but not 8.20.  I have however, verified that the VI is still running (add an indicator to the iteration counter).  It would be a more conclusive test of course to run this with HW and ensure the external devices are still operating... ...Ok, I've tested it using a Compact FieldPoint and verified that the VI does indeed continue to run.

I have reported this behavior to R&D since it does not occur in LV 8.20.  The Corrective Action Request number is 116562 if you would like to follow the status of our work.

Thank you for finding/noticing this,

[Ben]

"The Corrective Action Request number is 116562..."

Excellent David!

Ben