I downloaded the DDK for the E series. In the documentation there is an example 4 about using DMA to transfer data from the FIFO. But in the archive from http://ftp.ni.com/evaluation/labview/ekit/other/downloader/nieseries.zip there is no example 4.
Was it removed on purpose?
This particular example does not exist for the E-Series DDK. You can recreate it by following the steps in the PCI E Series Register-Level Programmer Manual.