Increasing Num Legend Rows crashes LV if Stacked Chart

[Karunya_R]

Hi Hans,

This is CAR that is targeted to be fixed in the near future. Your subVI did repeatedly crash my LabVIEW when added the LegNum property node. I did notice that you didn't have VI server to update the values on the main value. Here are a few links to explain VI Server, Programmatically Controlling VIs, Programmatically Controlling LabVIEW.

I apologize for your experience using this particular property node!

[daHans]

Thanks for your answer 🙂

But then I don't understand workaround #2 (described a few replies before from Juan Galindo):

"2. Place the stacked plot in another VI and show it on the front panel via a sub-panel. Then use VI server to programmatically update the chart."

So there's no workaround, or?
Or have I done something wrong in my VIs?
Yes, you're right, I can update the values in the "test chart.vi" using VI server set property but I still cannot change the number of stacked plots, or?

Best regards
Hans

[Karunya_R]

Hi Hans,

The VIs that you sent me did not use VI server to update the property node. However, like the workaround says, it is possible to update the the front panel using VI server.

[daHans]

In the examples and descriptions (of using VI server) I've found, only values of controls of the opened VI are changed, but no property node like "LegNumRows" property node of the Chart !

So I don't know how I should change my VIs to set the "LegNumRows" property node of the Chart in the "test chart.vi" with VI server 😞

Can you please modify my VIs the right way or can you give me a hint?

Best regards
Hans

[Karunya_R]

Hi Hans,

Please take a look at this and this

Good luck!

[coobery]

2. Place the stacked plot in another VI and show it on the front panel via a sub-panel. Then use VI server to programmatically update the chart.

can offer one example to show how does it work

thanks

[Karunya_R]

Please take a look at the above forum posts to understand VI server and tips on how to use it.

[coobery]

Yes, I did ,

however, unfortunately and confused, when I try to use Sub-panel and VI-server to update  the polts LV crash too.

WHY?

regards

[Karunya_R]

Cooberry,

This is a bug that has already been reported to R&D. They are still working to fix this.

I am sorry about your experience with this!

[SteveP]

According to the 8.5.1 bug fixes at http://zone.ni.com/devzone/cda/tut/p/id/6927, this is reported to be fixed.  "Fixed Issue > Front Panel"

4CUGA5RK

Resizing stacked plot chart legend at run-time crashes LabVIEW

but my example vi in the first post now gives an error even when decreasing the number of legend rows.

Error # 1000 "This vi is not in a state compatible with this operation" at the Legend : Number of Rows property.

The original 8.5 Known Issue is at http://zone.ni.com/devzone/cda/tut/p/id/6449#4CUGA5RK

Steve