Writing a complete net tracer in SKILL is quite a lot of work - I know others on the forums have done so themselves, but if I was you I'd re-use the mark net capability. What I'd probably do is: Use leMarkNet giving it a coordinate of the starting point leSaveMarkNet to save all the resulting marked shapes to a temporary cellView Use dbGetOverlaps() with a zero-area rectangle formed of the second point twice in the temporary cellView. If there are any shapes under the second point, then there's a route from a to b. leUnmarkNet to unmark it again Something like that anyway. A lot of work has gone into mark net and the performance of mark net, so writing your own shape tracer is almost certainly not worth the time and effort to do so (efficiently). Andrew.
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