I am using a PCI-6731 in a Windows 7 64 bit computer. When I run the VI for controlling a mirror galvanometer for an OCT system, it throws an error code of -50400 from the DAQmx start task vi. The card is visible in MAX, I have reset the device in MAX, uninstalled it in device manager and reinstalled it. I have also repaired DAQmx and LabView from uninstall/repair/modify from the control panel. The problem is that the card works in another system which runs the same OS and version of LabView and it worked yesterday in the system in which it is not working today. The card passes the self-test in MAX too. I'm out of ideas.
LabView version 2010 64 bit
DAQmx version 9.7
