Physical / electrical concepts

endpoint_off_grid

ERC warning that a wire end or pin is not on the snap grid. Cosmetic-leaning but can cause real connectivity bugs.

How it looks

Drawing

On screen they touch; to KiCad they are two separate points.

A wire end or pin sits slightly off the snap grid, often after editing a file by script or importing a design.
ERC warns: endpoint_off_grid. Mostly cosmetic...
...but where an off-grid end should meet another item, the connection may silently not exist, leaving a net broken in the netlist.

Prevented by the snap grid; a broken join shows up later as unconnected_items on the board.