Hi A,
Have you tried increasing the size of your buffer? I believe
in C this can be set using the DAQmxCfgOutputBuffer function. You might check out this <a href="http://digital.ni.com/public.nsf/allkb/34B9B5A331DE0E18862571F80072FAEA?OpenDocument" target="_blank">link</a> and see if
increasing the buffer size resolves the issue.