Hi Eric,
I can't be sure without looking also at the project, but my guess would
be that you compiled the VI by clicking on the "Run" arrow. So what is
happening is that after it's done compiling the VI, it's downloading it
to the board and trying to run it. Since you haven't configured and
enabled the reference clock to the ADC, then the ADC_0_Port_A_Clk is
non existent. Since the VI is trying to send some data to the host, it
needs the clock to be running, otherwise you get the error that you're
getting.
So, what you should really be doing is compiling the VI by
right-clicking the VI in the project explorer and clicking on
"Compile". If you hit the run arrow because you had disconnected from a
previously started compilation, then you can just ignore the error.
Then to run the VI you must create a host VI that confiugres the clocks
before trying t access any controls/indicators/FIFOs.
Hope this helps
- Mauricio