Hello, I have win7 pro on two PCs, and LabView 2012 Full, v12.0.1f5. I use charts in two applications run on these PCs. I experiance that, seems random, sometime I get my chart data lost completly. I set the chart history lenght to 10080 samples (i update the charts at every minute, so I have 7 days history). I know there is a nicer way to plot data at that big size, but I am satisfied with the in-built "decimation", so I can see the whole week data, or I can check only several hours for example. I use property node to scale the time axis when the operator wants to see less data (or just manually changing the x-scale numbers). I used these charts in the last 2 years without any problem. I do not know what is causing that, but I started to encounter at random times that, the chart somehow "clears" itself (and no one clears the data manually, I can be sure, and no internet connected to these PCs 🙂 ). For example: I have already full buffer, 1 week of data, and the next morning I see that, I have only 2 hours of data "left", the oldest data point is from 2 hours before. I have checked my code, and it simply adds values at every 1 minute, and I never do any history property node manipulation in it. So no idea whats going on? The biggest problem is that, it looks like I cannot reproduce this error, it just seems to happen randomly...I do not know if it helps, but I attached the chart which I use. What can cause this? Labview update? This is not too serious problem, since I save all data to TDMS file, but annoying, and strange... thanks for suggestions!

LabVIEW

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hello, no, the app is running as VI(s) from LabView, not an exe or installed program.

But in the last weeks I did not encounter the problem again...

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