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niScope_InitiateAcquisition error for a second 5132 USB scope

I have 2 NI5132 USB digitizers.  Either one alone works fine.  But if I plug both into the USB bus, then the last one connected produces the error message "Error BFFA666A   NI Platform Services: No transfer is in progress because the transfer was aborted by the client....."  with a status code of -50405.  This error occurs when the niScope_InitiateAcquisition function is called for the offending scope.  Up to that point, all the needed niScope_ function calls work, namely:

Init, ConfigureVertical, ConfigureHorizontalTiming, ConfigureTriggerImmediate, ActualRecordLength

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Hello PhilLC,

 

According to this KnowledgeBase, the issue you are experiencing is a common incident that arises when using multiple USB devices, and it is a system dependant issue.  Fortunately, resetting the device should do the trick for reestablishing communication.  Please reference Issue 2 in the KB for the steps to resolve the error. 

Kyle A.
National Instruments
Senior Applications Engineer
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