Pix4D and Pixhawk compatibility on fixed wings

The question then is why Pix4Dmaper can’t read the 3DR log files? The flight log is not edited in any way by me.

Editing the flight log rows as u described can’t be the right procedure - what else is the point of having the option to load a 3DR flight log then when i can’t use the same?
If i follow your description, it practically results in a different input format. I am aware of the different types of Image geolocation files that can be used (PPK image geolocation accuracy). And since when can’t Pix4Dmapper read a latitude/longitude? It shows it in the drop down menu (look at the screenshot).
Or have I misunderstood you? What am i missing?