Issue with camera trigger during non grid mission

Hi guys. I am having issues getting the camera to trigger when conducting a waypoint flight using the DO_SET_CAM_TRIGG_DIST command. It works fine for a grid survey or when selecting trigger camera now, it just doesn’t seem to be working during a waypoint mission. The bin file states that no triggering occurred. Can anybody assist as to why this may be please? Am I missing a step as I notice that when in Auto Grid planning that the camera settings are available, but this does not appear to be the case when simply adding the DSCTD command within a mission. The other thing I cant figure out as how to tell if the camera is triggering during flight please. I am using a Sony A6000 in a Tuffwing mapper with Tuffwing camera cable and hot shoe. Any help greatly appreciated.

Was unable to paste an image of the flight plan. Just to confirm, DSCTD inputted with a distance value of 30 set.