I am using the TDMS Direct Integration in NI-DAQmx Logging and I am using the property Logging.SampsPerFile, and seeing a problem where the Timestamp randomly is missing from the automatically incremented logged files. I have the Logging.SampsPerFile set to 10000000 which when I have 32 channels gives me a little over a gig per file. Looking at the resultant files, in about a quarter of them, there is no t0 or dt information.
Ben Yeske