LabVIEW front panel "tearing" display glitch

[RWiersma]

IIRC, I believe this issue has been resolved with 8.2, as per a sister thread on this topic.

I'm still working in 8.2 (I know, I know)... and have not had the problem even once in months.

-Ryan

[Daniel Lathrop]

I am using 8.2.

[RWiersma]

Shows what I know! 

Seriously, tell us more. Was your current project started in an earlier version of Labview?  Have you attempted to rebuild it yet (SaveAs, older version, 7.1, Exit LabView, ReOpen the project in 8.2)?

-Ryan

[Daniel Lathrop]

The only version of Labview I have is 8.2, so this VI has always been 8.2.  I downloaded the example vi from the other thread to verify that my problem is the same.  It is.  The example consists of a tab control with two charts.  A small part of my VI has a tab control containing a couple of charts.  What I find somewhat odd is that this worked for a couple of months, until yesterday when I made a couple of edits to a part of the VI that has nothing to do with the tab control or those particular charts.  I reversed the edits, but that didn't fix the problem.

The two work arounds that I know about are not very practical.  This is a fairly complex VI, so I am not really sure how to go about cutting and pasting into a new VI.  If I select the entire block diagram and cut and paste it into a new VI, do the front panel controls come along for the ride?  If so, are they arranged the same or randomly?  The other workaround, saving the VI as a previous version, is going to break a lot of things.  I also just tried using Save As to see what my options are, and I couldn't figure out how to save it as a Labview 7.1 vi.  Do I have to have the previous version of Labview installed?  I'd rather not have to spend the time fixing everything if this issue has a known fix, but I couldn't find anything mentioned anywhere.  So I asked.

[RWiersma]

Well, the fix used to be: click on File, pick "Save For Previous Version".

Caveat: I just tested it on my workstation here, and I can no longer pick 7.1. Not sure if 7.1 needed to be installed, or what the deal is. Maybe one of the resident experts can chime in here.

If you DO have the option to save as 7.1, just save your project (do a backup first!!) as 7.1. Exit Labview, open Labview (8.2, like normal), open your project, and the tearing should be gone.

If you are like me, and can no longer select the option to save as 7.1, then you might be be up a creek. That was the fix I used to perform.

-Ryan

[RavensFan]

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RWiersma wrote:

Caveat: I just tested it on my workstation here, and I can no longer pick 7.1. Not sure if 7.1 needed to be installed, or what the deal is. Maybe one of the resident experts can chime in here.

If you DO have the option to save as 7.1, just save your project (do a backup first!!) as 7.1. Exit Labview, open Labview (8.2, like normal), open your project, and the tearing should be gone.

-Ryan

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Historically LabVIEW could only save back one version so (this has changed somewhat with LV 8.5):

LabVIEW 8.2 can only save back to 8.0, but only 8.0, it couldn't do 7.1

LabVIEW 8.0 can save back to 7.1, but only 7.1

LabVIEW 8.5 can save back to 8.2 or 8.0

[Ben]

Q: Has anyone seen these issues with LV 8.5 ?

I was fighting some terible issues with charts on tabs, (with some on nested tabs) and sub-panels in LV 8.2.1. I killed a week-end trying to figure out what combination of "defer FP updates" hiding objects etc was killing me.

Eventually I tried it in LV 8.5 and the issues (mostly chart graphic garbage*) went away. I also realized an unexpected bonus when I saw the CPU load for the same app was significantly lower under LV 8.5.

Since seeing those differences, I have decided I am not doing any more development in LV 8.2.1.

So...

Is anyone seeing these issues in LV 8.5?

Ben

* Another annoying bug was that buttons would "stick" making me feel there was something wrong with my tackball. Also observed was the LV one-button-dialog was getting stuck. All of the above was reported to NI but no record of these bugs being fixed in LV 8.5 could be found. Don't you hate it when they accidently fix something and nobody can explain why or how!

[RRRRSSSS]

I have started using Tabs again when I moved to LV 8.5, I was avoiding them in previous LV versions

I have a few programs using Tabs with chart/graphs and have not encountered any issues.

[Eli_S]

Hi Daniel Lathrop,


What version of LabVIEW are you developing in? I have LabVIEW 8.5 and if you want I can test your VI over here and let you know if it exhibits the same behavior.

[JeffBoettcher]

Apologies, there were several threads on this issue, and it appears not all of them got updated.  This was documented and tracked internally by CAR# 3V5BLTOC, and was fixed in version 8.5.