Why does openlane specify the

<http://tracks.info|tracks.info>

file for

initialize_floorplan

? If I understand correctly,

initialize_floorplan

can extract the layer infos from the lef file if there is no

-tracks

file. So, what is missing in the lef file ?

initialize_floorplan

creates tracks only in the preferred direction when using a tech LEF, while some of the other tools actually expect tracks on both directions (vertical and horizontal). It's pretty easy to modify this behaviour of

initialize_floorplan

though. However, the advantage I can think of regarding

<http://tracks.info|tracks.info>

is the ability to easily adjust tracks in cases where the track pitches in the tech LEF are not suitable or accurate.

Ok, thanks.