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AR# 32460 11.1 Timing Known Issue - "FATAL_ERROR:Timing:bastwoffsetpref.c:679:1.160.14.3.10.1 - Clock arrival time not found"

Description

Keywords: rising, falling, offset, out

When I have an OFFSET OUT constraint with the RISING or FALLING keywords, the following error occurs:

"FATAL_ERROR:Timing:bastwoffsetpref.c:679:1.160.14.3.10.1 - Clock arrival time
not found for your_clk. Process will terminate. For
technical support on this issue, please open a WebCase with this project
attached at http://www.xilinx.com/support."

How do I work around this issue?

Solution

This error can occur when MAP removes one of the clocks, or if the clock contains a TIG constraint. To work around this issue, remove the RISING and FALLING keywords.

This is a known issue and is scheduled to be fixed in the next major release of the software.

Actions

AR# 32460
Date Created 04/10/2009
Last Updated 04/20/2009
Status Active
Type
Feed Back