Answers Database

M1: WARNING:bastw:174- The current connection evalutation limit of 1000 caused ....


Record #3374

Product Family:  Software

Product Line:  Merged Core

Problem Title:
M1: WARNING:bastw:174- The current connection evalutation limit of 1000
caused ....



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

Urgency: Standard

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 1:

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



End of Record #3374