LVS falure for block in toplevel

Discussion created by nagaraj.kumbar on Jul 27, 2008
Latest reply on Feb 15, 2009 by banderson

Hi, I have a analog block which comes clean during stand alone lvs but fails when hooked up at the top level. Interfaces have clean connections.  If this block is black boxed during lvs (LVS BOX command) top level finds some extra cells in the top level. which it says they are found at the location of black box.

If the block is flattened during lvs. the results shows property errors on some devices in the block and the error margin is 100%. Any one face similar issues? or tips to debug?