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AR# 3374

1.5i/2.1i: WARNING:bastw:174- The current connection evalutation limit of 1000 caused ....

Description

Keyword: M1, timingan, trce, trace, pathlimit, XILINX_PATHLIMIT

General description:

When running M1, got the following warning:

WARNING:bastw:174 - The current connection evaluation limit of

1000 caused the truncation of timing analysis for paths through

1.55% of constrained connections, which may limit the accuracy

of this analysis.

You can specify a larger limit with the XILINX_PATHLIMIT

environment variable to increase the accuracy of this analysis.

Solution

Resolution:

XILINX_PATHLIMIT is used to limit the number of paths traced.

If you want more paths traced,

you can set the XILINX_PATHLIMIT variable in you autoexec.bat

(WIN95) or system environment setting (WINNT) to a higher

number. The variable is default to 1000.

The syntax is as follows:

SET XILINX_PATHLIMIT=2000

This path limiting feature was implemented to help deal with

the 'path fear' issue, that the timing driven tools (par and

trce) can bog down when the number of paths enumerated is so

large that the time needed to process them become excess

AR# 3374
Date Created 02/03/1998
Last Updated 01/18/2010
Status Archive
Type General Article