Physical / electrical concepts

unconnected_items

DRC error that a net has pins not joined by any trace (or copper pour). The autorouter couldn't fit a route, or a trace got removed. Critical.

How it looks

Illustration on real CORE3588 geometry: the fault is drawn in on purpose. The real board has none.

The Q1 corner of CORE3588 with one track removed on purpose. The real CORE3588 has 0 unconnected items.

1One track of net Net-(Q1-B) deleted for this picture. KiCad still knows Q1 pin 1 and R60 pin 2 must join, so it draws the dashed airwire, and DRC reports unconnected_items.

Unconnected items are what an autorouter leaves behind when it fails; the cure is rip-up and reroute or negotiation.

Its opposite error is shorting_items: copper joined that should not be.