The store of obstacles for path planning was not set up

What ArduPilot says:

• DB init failed . Sizes queue:N, db:N

With path planning on (OA_TYPE is not 0) ArduPilot keeps a small store of obstacles seen by proximity sensors: OA_DB_SIZE places (100 by default), fed through a queue of OA_DB_QUEUE_SIZE (80 by default). At start-up the store could not be set up, and the line gives the two sizes as they are set. Path planning then knows nothing of what the sensors see; it still plans around fences.

What to do, most likely first

1. OA_DB_SIZE or OA_DB_QUEUE_SIZE is 0, which switches the store off.

   CheckOne of the two sizes in the message is 0.

   FixIf the copter has a proximity sensor to avoid obstacles with, set OA_DB_SIZE to 100 and OA_DB_QUEUE_SIZE to 80 and reboot. With no such sensor the line is harmless.

2. Both sizes are above 0, and the board had no memory for them.

   FixLower OA_DB_SIZE, or free memory by switching off features you do not use, and reboot.

Parameters to look at