Stubs (Stubs)

Reports line endpoints that do not touch any other feature.

Internal ERF Name	<Area>:stub
Measurement Shape Measurement Value Measurement ID	Endpoint Shape Feature representing the open dimensions (r8)
Layers Displayed	Signal layer
Graphic
Purpose	In some cases, stubs indicate an error in the design. Normally, lines end with pads, or are drilled by component holes or vias (wide ground conductors).
Function	Reports line endpoints that do not touch any other feature. Measurements are shapes representing the endpoints (for example, a circle for a round, capped line). When two identical lines lie on top of each other, the endpoints touch each other. This is reported if the end points do not touch other features. Drilled line endpoints are not inserted as measurements.
ERF Parameters	pp_layer
ERF Variables	v_stubs_check_both_ends v_terminated_stub
Limitations	Features tagged with attribute Copper Balancing are not tested for ‘Stubs’ so as to improve performance. The endpoints of lines that are shaved (touching successive negative features) are not inserted as measurements. When two circuit lines coincide, a false alarm may be reported at the end of the wider line.