Error -200077 when trying to make an analog trigger

[freddearaujo]

Hello to all,

I am trying to read the signals of two microphones using the signal of one of the microphones as a trigger. But I having trouble to set the trigger properly. I made a VI using examples I found in internet, but the error -200077 keeps showing up. I could not understand what could be the problem, but I am sure it should be very simple to solve 

The measurements work fine if I by-pass the trigger. (the Case. Structure in the VI)

My VI is attached below. 

I am using a NI 9234 board and LabVIEW 2015

Thank you all in advance

Frederico Araujo

[ligiatersitano · Accepted solution]

Hello Frederico,

I took some time to study your program and I believe I found some things to help you.

• Error -200077 When Performing Retriggerable Input/Output - This will give you a solution for a similar problem using DAQmx Start Trigger (Analog Edge): http://ae.natinst.com/public.nsf/web/searchinternal/69c4e10fa98fb92d482574fa00729ad5?OpenDocument
• Analog Acquisition with Software Analog Reference Trigger – This is a post by one of ours Applications Engineers showing some steps to implement an analog software retriggerable acquisition: https://forums.ni.com/t5/Example-Programs/Analog-Acquisition-with-Software-Analog-Reference-Trigger/...

Hope it helps you out.

Best regards,