LabVIEW Crash after graphical mapping and line_style field have been changed

Hello everyone,

I had a very specific problem that occurred to me mainly by 'chance '. But the error is reproducible every time I tried it.

I'm under LabVIEW 2012 (German) on a Lenovo PC with Windows 7.

The VI that generates the error adapts the appearance of a chart according to the type of data that must be drawn.

I have attached the blockdiagram of VI as an image.

The chart is part of a VI that is inserted into another VI as a secondary.

Issue VI performed as follows:

(1) take the data in a table of waveforms.

(2) check to see what type of data it is, and take the form of style information a type definition.

(3) set the graphical style for X and Y axis: Autoscale?, reversed?, Grid_Colors, (linear/logarithmic) mapping, limits, Axis_Style, Offset and factor

(4) put the waveforms in the chart in order to ensure the right number of plots for step 5 (data must also take anyway.)

(5) iterates on the plots and value: line width, color, style, Style of Dot, visibility

(6) to force a refresh.

If I perform all of the above steps the VI blocks between step 4 and 5. This leads to a failure of LabVIEW to 100% time, need to LabVIEW and ended with the Task Manager. In about 5% of cases my entire operating system goes down, too.

The error will NOT occur if I do only one of them:

(1) use waveforms 'empty '. This means that the table does no data points.

(2) do not change the mapping of an axis any. (linear logarithmic or vice versa)

(3) does not change the line of off-road style.

In the case of mapping it makes no difference if the change is not made or if new mapping is the old mapping. In both cases the error will not occur.

For me, the solution was to remove the line Style change. I can live with that.

My Question is now: is that what someone knows why this happens?

Kind regards

Sebastian

Hi Sebastian,.

This does not seem like a common problem. The behavior that you see in your application is probably due to a lot of load on an item in a very short time. Have you tried to do a little slower, perhaps with a wait between the two?

A refresh of a graphic element, espescially if there is a lot of data points already inside, takes a lot of load on the system, it's probably why the system doesn't crash if there is no data in it points.

Do not modify all properties of a live Widget in a single cycle.

Kind regards

Tags: NI Software

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