Values not always updating on front panel

[sarah 665]

I have written some simple code which is set to update saved values onto the front panel. Using the debugging probe I can see that the data sent to the indicators is correct - however the indicator on the front panel does not always update to that value - sometimes it does and sometimes it doesn't - and no, there is no race condition involved.

[Gorka Larrea]

Which version of LabVIEW are you using? At least in my LV 5.0.1 all is correct. Have you put a small delay in the while loop to avoid LV get all your system resources and don't let the screen update (this happens under Windows)? Could you send an example (for me only LV 5.0 is adecuate).

[sarah 665]

I'm using LabView6 - The Code w/ which I'm experiencing problems is in a Case Loop, I'll try a delay. Explain this Windows/ screen updating problem to me again?

[Ben]

Hi Sarah,

Right-click on the indicator and make sure "Synchronous Display" is set. This will force the code to wait until the indicator is updated before continuing.

The default for indicators is generally NOT synchronous. This allows loops that update indicators to iterate faster than the screen can update.

I hope this helps,

Ben

[sarah 665]

A good suggestion - but unfortunately I have already tried this and saw no change.

[shoneill]

Hi

I had the same problem in LV 5.0 when trying to print the final values of a
program. The only way I found to "force" the front panel to update is to
quickly hide and re-show the panel using VI server. It looks bad but works.

Are therea ny better solutions available?

Shane

sarah schrieb in Nachricht
<506500000005000000AA280000-986697009000@quiq.com>...
>A good suggestion - but unfortunately I have already tried this and
>saw no change.

[sarah 665]

THe only way I found to get it to work was to put a 'wait' in the loop. 15ms is the smallest time I can wait and still have the values update.

[sarah 665]

On second thought, does it matter that I'm using local variables to write to a control. If I set synchronous display on the control is this passed on to the local vars?

[Gorka Larrea]

If you are using local variables, check for them, race conditions may arise.