How to monitor DAQ card outputs during TestStand operation?

I am trying to debug a rare failure mode on a test station that runs on TestStand. TestStand controls measurement equipment through a PCI-GPIB controller and a DUT and DUT switch box through two NI-DAQmx devices; PCI-6509, and PCI-6534. I believe that root cause of the failure is due to the software not putting the DUT into the correct state for the test. In order to check this I need to monitor the changes on the GPIB and DAQ cards. I was able to use NI Spy to monitor the commands on the GPIB bus but I have not been able to monitor the state of DAQ cards. Is there a tool that will allow me to pause TestStand during its operation and look at what logic states the PCI-6509 and PCI-6534 outputs are in? Or at least monitor the I/O of the PCI-6509 and PCI-6534 cards similar to what NI SPY offers for the GPIB cards?
Regards,
David