I turned .pcbdoc into kicad file.
then once I opened it. this error was occurred (right side of picture)
I opened kicad pcb file using text editor. but I couldn’t find any problems.
this error told me USB-20 has invalid layer, but I think there’s no wrong layer…
Actually I don’t know why this is placed on edge cuts.
this is not my pcb, I received this file from another company to see some IC’s footprints.
I just convert it from altium format to Kicad format using external tool.
It might be that altium or the altium converter script do not know how to deal with plated slots. Give the two pads with number 4 the type plated through hole and the slot size (drill size with drill type set to oval) as suggested by the datasheet of the component. (or use the size as defined by the old edge cuts pads as the slot size.)