Error -1074118634 occurred at niScope Fetch.vi

[UW-AC-1]

Hey all,

I am having a problem with triggering in the current VI that I am using. I keep getting an error message (Error -1074118634 occurred at niScope Fetch.vi) that says "The trigger has not occurred for the requested buffer, so data cannot be fetched relative to the trigger" when I try to start recording data from a transducer. Does anyone have any suggestions on how to fix the error?

I have used MAX to test the trigger function, and it works fine everytime (so there is not a problem with the signal).

Thanks!

[A_Donfigulation_Error_Has]

Hi UW-AC-1,

I would double check your wiring for your trigger on your card and make sure that the trigger is being sent. What kind of trigger did you setup with your niScope Configure Trigger.vi with?

To be safe, I would also use a Fetch Relative To property node so you will have more control of which trigger your fetch is referring to. An example of this property node can be found in the niScope EX Fetch Forever.vi in the example finder by navigating to Hardware Input and Output -> Modular Instruments -> NI Scope -> Continuous Acquisition.

Regards,

Jason L. Lii

Applications Engineering

National Instruments

ni.com/support

[UW-AC-1]

Hi Jason,

I set up an Analog Edge Reference Trigger with the niScope Configure Trigger.vi.

I think that the VI is otherwise set up correctly, but I have attached it below to see if you have any other ideas/advice!

Thanks for your help so far 🙂

[A_Donfigulation_Error_Has]

Hi UW-AC-1,

I would set a trigger level and trigger slope for both DAQmx Configure Trigger Edge.VI's. Since you are trying to use your transducer channel to trigger the reference trigger, I would also make sure that the values you are receiving from the transducer are within range such that your trigger will fire.

Regards, 

Jason L.