Anyone know why this VI wont work?

[lorc34]

Error is -200278

<B> Attempted to Read Sample: </B> 1000

<B> Property: <B> RelativeTo

<B> Corresponding Value: <B> Current Read Position

<B> Property: <B>Offset

<B>Corresponding Value: <B> 0

<B> Task Name: </B> _unnamedTask<8>

USB-4431 DAQ is being used. I think it works with my USB 6009 DAQ though.

[GerdW]

Hi lorc,

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@lorc34 wrote:

Error is -200278

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Yes, we know…

Did you read the error description? You were to slow to read samples!

You implemented some operations in the loop that tend to get slower and slower as execution continues: building growing arrays (aka appending to this waveform) and displaying a growing waveform in a graph without proper decimation!

Suggestion:

• Read a fixed amount of samples instead of "anything available".
• Don't grow the waveform as large as possible.
• Display only a reasonable number of samples in your graph… ("Reasonable" means about twice as many samples as your graph's width in pixels.)