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05-03-2020 03:15 PM
I am trying to use an Express XY Graph in a VI. The block diagram shows the Build XY Graph block with a "?" in it. The help says use right-click Replace|all pallets| Select VI. I did. But I can't find a simple XY Graph VI to put in the placeholder. Where is it? Where in the manual does it say what vi's can go in here? Am I missing something fundamental here?
Max
05-03-2020 04:11 PM
Can you attach a VI, or at least a screen shot showing what you are talking about.
It is very difficult to help someone troubleshoot a paragraph.
05-03-2020 09:17 PM
Sure. I'm doing Bishop's Modern Control Systems tutorial. He uses an Express XY Graph VI which looks like
When I place the same VI I get a poor cousin:
The help says to use the rightclick menu "Replace" to find the graph VI that supposed to go where the question mark is. I can't find that. If I replace from the Block Diagram I don't see anything that looks like the XY chart. If I go to Select VI, I get right to the LV library and have no idea where to find the XY chart. If I try to replace from the panel, and stick in the Express XY Graph, I get another error:
So I punted and just did a copy paste from Bishop's example. (I wonder how much of Labview code is created that way because the programming UI is barbaric.)
Anyway - do you know how to populate the sub VI of the Build XY Graph vi?
05-03-2020 10:32 PM
I've never seen Build XY look missing like that.
Since that node is yellow, is it possible someone converted that to a regular subVI, but then failed to attach it?
Have you tried going to the front panel, graph palette, then click Ex XY Graph?
That is how I know to drop that express VI.
05-04-2020 04:31 AM - edited 05-04-2020 04:32 AM
Hi RavensFan,
I see the same problem in my (private) LV2019 installation. (Somehow, somewhere there was a problem at installation time for this very specific ExpressVI. But as I don't use such ExpressVIs I don't miss it.)
Let's see if this problem vanishes once I update to LV2020CE…
@Max:
I didn't bother to correct/repair this problem because there are other ways to build plots for XY graphs. You may try to repair (or uninstall/reinstall) your LabVIEW environment. Or you may try to upgrade to LV2020CE as I will do in the next time…
05-04-2020 06:55 AM
So should this issue be escalated to NI tech support?