Issue with front panel control update/refresh

[mikefoo]

Hi..

I am having issues with some front panel controls (boolean and others) being partially visible to not visible at all.

The controls are not visible when the VI is first opened, however if you mouse over where the control should be the button sometimes partially reveals, however will often disappear randomly. Running the VI does not appear to change anything.

This issue doesn't seem to be consistent across similar types of controls, as some buttons are visible, while others are not.

Issue seems to have occured after an update from labview 8.2 to 8.2.1. Have had a quick look but haven't located any 'known' issues.

Cheers,

mike

[altenbach]

Have you tried to update the driver of your video card?

[Mathan]

Hai,

I think may be you can place the control over some boxes or some tabs. Try placing(moving) that control over some other place in ur front panel.

Hope this helps!!!!

Mathan

[smercurio_fc]

Your statements seem to imply this is happening with a specific VI. Is this true, or is it happening with all VI, especially with new ones?

[Mathan]

Hai,

As he told have u able to reproduce in a new separate vi? same problem found? then give a screenshot to clear further.

Mathan

[CyberTazer]

I have seen this happen in 2 scenarios

1: Your video card may be having difficulty redering the VI. This happens most often, in my experience, when you are trying to update many controls at a high rate of speed. Try opening the settings of your video card and changing the hardware acceleration settings to a lower level. You can do this under advanced video settings in the Troubleshooting tab.

2: You have other controls sitting on top of the controls you are trying to see. Some controls you seem to be able to see through, but they are actually just the same color as the background. A panel control is a good example. Also, some controls have a border that can slightly overlap other controls.

I am not positive this will help, but I thought I would pass it on. Good luck.

[mikefoo]

in response to your queries....

- i haven't tried updating my video driver yet. Our IT department give us fairly restricted admin access and it will be a pain to do, however if it comes to it i'll try it..

- so far, the issues only seems to apply to one particular VI, and i haven't been able to reproduce the issue on another VI. Yet..

- the issue occurs whether the VI is running or not. The moment I open the VI the same group of FP controls are either completely invisible or partially visible. If i mouse over any of them, or move them, they become wholly/partially visible, but if i click somewhere else, then more often than not, they disappear again.

- it appears to apply to the same group of controls, however there are similar controls (boolean buttons etc) that are set up and used in exactly the same way but don't appear to be affected..

- i have tried copying the VI and still have the same issue.

the only other thing that i did to the VI prior to these issues was to run it through a ICON editor VI that we are currently in the process of editing. Other than that and the 8.2.1 upgrade, i can't think of anything else that would have affected it..

starting to think it may just be a buggy VI and may have to re-create it where i can.

thanks for your help guys..

[Ben]

If can narrow down the issue to a small VI that demo's the issue please post so others can confirm or denigh.

I saw strange issues with graphics and behaviour under 8.2.1 that went away by running under LV 8.5. This is the primary reason I have avoided any new development in LV 8.2.1.

Ben

[mikefoo]

i have since copied most of the block diagram components to another VI and recreated most of the front panel buttons/graphs etc.

So far..the problem has not reappeared.

I have attached the old VI for you all to have a look at. (Didn't attach supporting VIs so it won't run but the problem is there upon opening the VI anyway)..

Mike