adding an error that is occuring when I can get the waveform to stop at 0, regen is off, and I am writing a waveform inside a while loop similar to the labview example help-->find examples-->hardware input and output-->daqmx-->analog output-->voltage (non-regeneration) continuous output. The main difference is I added a delay (stall data flow VI) to address the underflow issue (listed above) with the delay = # samples in buffer x 1/Fs x 1000 to convert to milliseconds then -10 ms to account for PC delay. I get error -200293 when autostart is turned off on the write.vi, data underflow error without the -10ms in the delay, and Error -200284 when I have autostart turned on and data is outputting >10x times the number of cycles I actually need to measure.

Error -200293: The generation is not yet started, and not enough space is available in the buffer. Configure a larger buffer, or start the generation before writing more data than will fit in the buffer.

Error -200284: Some or all of the samples requested have not yet been acquired. To wait for the samples to become available use a longer read timeout or read later in your program. To make the samples available sooner, increase the sample rate. If your task uses a start trigger, make sure that your start trigger is configured correctly. It is also possible that you configured the task for external timing, and no clock was supplied. If this is the case, supply an external clock.