Here's a link to a thread on the Measurement Studio discussion board dealing with DAQmx error 200279 (trying to read data buffer that has been overwritten while running continuous aquisition):
These errors can be dealt with by modifying the RelativeTo and Offset properties of DAQmx Read. The same thing applies when using DAQmx in LabVIEW, so I thought this may be useful here.
Zador