AR# 9325

3.1i Virtex-E Map- Back annotated logic drops an inversion


Keywords: Inversion, Inverted, Inverter, dropped, lost, drops, simulation, annotated

Urgency: Standard

Problem Description:
A case has been seen where functional simulation of a design failed,
although the NCD logic appeared to be correct. The problem was
traced to a problem with the .ngm file which is written by map and
is used during back annotation.

A work around is to not use the .ngm file during back annotation.


This problem is scheduled to be fixed in the first major release
following version 3.1i.
AR# 9325
Date 08/19/2002
Status Archive
Type General Article