Figured out what was not working. The PX4FLOW starts first and takes precedence as the range finder. If I disconnect PX4FLOW and load with TFMINI first, followed by connecting PX4FLOW and starting the driver manually I can get both to work together. When I start the PX4FLOW manually I get a message warning me that PX4FLOW is not the rangefinder.
I want to automate this boot sequence. Is there a way by which I make TFMINI driver start before the PX4FLOW driver on my PIXHAWK? Right not the sequence is PX4FLOW first, and the LIDAR I have to start using extras.txt on my SD CARD.
Thank you for helping!