Debug naming error in Calibre LVS

Hi,
While running calibre LVS for a 40nm block,
i am getting an error like this,

LEGEND:
-------

ne = Naming Error (same layout name found in source
circuit, but object was matched otherwise).


**************************************************************************************************************
INCORRECT NETS

DISC# LAYOUT NAME SOURCE NAME
**************************************************************************************************************

1 Net 99648 ****************27
X169/15204

--------------------------------------------------------------------------------------------------------------

Please tell me how to debug this.

There may be a connection error. Is this the only error? Can you attach the entire error report? And if possible, layout and schematic snapshots?