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How to avoid nets being renamed during eco

Allan M

I am importing logic into an existing design.  "Allow etch removal during ECO" is unchecked.  Some of the footprint geometries changed resulting in pins disconnecting from nets during the import.  When a net has both pins disconnected, it gets assigned to a "dummy" net or, if over a shape, gets assigned the net of that shape.  This results in a lot of work to delete and re-route these nets.  How can I prevent existing clines and vias from losing their net assignment so I can fix up the disconnections caused by the change in footprint geometry?

Thanks.

  • oldmouldy
    The connect lines are going to assume "Dummy net" once all connections are removed, they can be re-routed to cover the "connect points", typically centre, of the pins to restore the net name. The Vias nets can be retained with the net property, "retain net of vias", this property can be assigned to "all nets" in the Constraint Manager, Properties domain.
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