This command instructs AF2 to recover the last fibre used if the gripper couldn't pick it up properly, or if the fibre was dropped during a move.  The command MUST be used immediately a fibre is "lost" in this way, otherwise unexpected fibre placement problems will occur, and fibres could be damaged. The command causes AF2 to inspect the immediate area where the fibre was last known to be. The fibre position is updated as soon as it is found. Any command aborted as the result of a fibre being "lost" can be repeated as soon as the fibre has been recovered.  If AF2_RECOVERFIBRE fails to recover the fibre, expert help must be sought before proceeding with any fibre moves.