Could you please test a few things.
1)Try out your setup in PicoScope â€“ with ETS on. (That will use 60 cycles and 20 interleaves, but should tell us if its labview or our drivers).
2)The wiring in your VI is slightly off â€“ the handle â€˜wireâ€™ is coming out of â€˜SetETSâ€™ and going to BOTH GetTimebase and RunBlock â€“ it should go into GetTimebase first, and then into RunBlock â€“ as it is, theres no guarantee which order they will execute.
3)Can you step through your diagram, with ETS on and find out which DLL call it hangs on ?