I just got back onto the customer system to check a few things, so here's some additional data...
* The PXI RT system is running Pharlap 13.1
* The file size of the TDMS file was 4,194,176 kilobytes, which seems eerily close to 2^32 bytes. Does Pharlap or TDMS have a file size limit of 4G? If so, that may be my issue. Is there a programming solution for handling this limit?
Thanks.