Unable to fly in Position Mode No local position

Pixhawk
1

Hi
I tried flying in position more indoor using optical flow without gps, but i keep getting no local position error and couldnt figure out whats causing this.

here is my flight log. thanks in advance.
https://review.px4.io/plot_app?log=631dbd48-b1c0-44d5-9041-f1d8fc0bbfa0

2

Flow can not provide a global position which is what position mode requires.

What flow sensors are you using?

3

i am using hex hereflow

4

That will not give a position local or otherwise. It can give you altitude from the lidar but that is not a position.