We are using labview 2011 to read a Keithely 6487 picoammeter. We get good readings for a while then suddenly Labview starts outputing NaN. It does this randomly. But once it starts it no longer outputs numbers to the screen only NaN. Right now our fix is to close restart labview. The error seems to be associated with the driver, in labview, that is for the Keithley (I think). Any ideas would be appreciated., thanks.
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