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AR# 13860

4.1i Virtex-II MAP - A fatal error occurs on a design with a split carry chain

Description

Keywords: FATAL_ERROR:Pack:pktv2carry.c:907:1.6, split, carry, chain, shape, builder, MUXCY

Urgency: Standard

General Description:
MAP fails and reports the following fatal error when a design contains a split carry chain (COUT of one MUXCY drives CIN of two MUXCYs):

"FATAL_ERROR:Pack:pktv2carry.c:907:1.6 - The carry chain shape builder failed to process carry multiplexer B26774_MUXCY. Process will terminate. To resolve this error, please consult the Answers Database and other online resources at http://support.xilinx.com"

Solution

This problem is fixed in the latest 4.2i Service Pack, available at:
http://support.xilinx.com/support/techsup/sw_updates
The first service pack containing the fix is 4.2i Service Pack 2.
AR# 13860
Date Created 08/29/2007
Last Updated 10/23/2008
Status Archive
Type General Article