Finally run checks that all connections are correct and that the PCB do not violate any design rules.
Ratsnest When pressing ratsnest, check that the message at the bottom of the window is Nothing to do. If there are still unconnected wires the number of airwires will be indicated. Make sure there are no unconnected wires.
ERC Run the Electrical Rule Check to check that two output ports are short circuited etc. Warnings that LED have no components have no value can be ignored.
DRC Runt the Design Rule Check to check clearance etc. Warning of non vector fonts can be ignored.