Waveform chart time sometimes decreases

[kc64]

I have a waveform chart with three plots vs time with update mode set to strip chart.  It is demonstrating strange behavior which I have never noticed before.  The time sample numbers at the extents of the axis sometimes decrease and the plots shift to the right instead of always left as I have always expected.  Can anyone offer a plausible reason why this situation might occur?

[Ben]

the following applies only to charts that are Waveform data types, otherwise disregard.

Check the validity of the t0 values in the WF. If the timestamp is earler than the latest value plotted, the chart will reset.

Ben

[kc64]

Thanks for the quick reply.  This happens to be a cluster of three DBLs so it doesn't sound like your comment applies.

[NAKeel]

I have never seen this behavior before either.  Do you think that you could post the VI that causes this and let me know what version of LabVIEW you are using?

Nick Keel 

Applications Engineering 

National Instruments

[kc64]

I have rebooted/shutdown everything and now can no longer repeat the problem.  I don't what to think about this.

Until it recurs, I think we should treat this like a dead issue.

Thanks,

kc