The tool now proves which pin meets which across a cable between boards, but it does not check whether the cable can carry the current. A 0.5 mm FFC conductor is rated about 0.4 to 0.5 A, and nothing compares the rail's current per pin against that, adds cable IR drop (the board sims stop at the board edge), or checks FFC thickness and contact plating against the socket, so a cable can be ordered that does not hold.