Labels have no geometry error in Virtuoso

When I extract my layout I get the error - "labels have no geometry",
with the markers just placed nowhere but in the dark space inside the
layout and I have only created the labels at the inputs and outputs,
where there are no markers. There are about 15 of them in the whole
layout. When I extract the layout without using the
parasitic_resistance and parasitic_capacitance switches then it gives
no error. The DRC is error free. How do I get rid of this problem?

Any help will be appreciated.

Thanks,
AR

 

Condition 1)
Labels are connected to conductors when the label origin is over the
conductor.

Condition 2) Turning on parasitic_resistance typically invokes the PRE
function which
turns conductors into parasitic resistors except at "contacts" to the layer
and at "device" interface points.

Since condition 2 reduces the "valid" locations where labels can connect to
conductors, the person running extract with
parasitic resistance must understand why the labels have no connection to
the remaining conductors. ( The "layer" that had
a net name under the label is now considered to be somewhere on the body of
the parasitic resistor. ) It is somewhat
instructive to look at the conductors saved to the "extracted" rep (if the
kit bothers to save the conductors here. Not all do!)

A solution is to move these labels over top of "contacts" or "device"
connections ( or "layer" "pin")

With some more advanced kits, the inclusion of a "layer" that turns off
parasitics is available.
( I know, because I have coded several that do! )

-- Gerry Vandevalk.