Error -201062 Selected Lines Do Not Support Buffered Operations

Updated Oct 23, 2018

Reported In


  • Multifunction I/O Device
  • Digital I/O Device

Issue Details

When trying to use PFI lines for a hardware-timed digital task, I receive error -201062: selected lines do not support buffered operations. This error doesn't occur when using port 0. 

Error -201062 occurred at Untitiled 3
Possible reason(s):
Selected lines do not support buffered operations.



This error will appear if trying to use anything other than port 0 for a hardware-timed digital task.

Port 0 allows hardware timing; allowing you to use a Digital Input or Output as a Sample Clock. None of the other ports have access to this hardware-timed digital input/output functionality and therefore cannot be used in this way. 


Additional Information

The distinction between Port 0 lines and PFI lines will be outlined in the specifications document for your NI Device. An example for the PXIe-6375 is shown below.



You can read more on the difference between Digital I/O and PFI in chapters 6 and 8 of the X Series User Manual, respectively. 



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