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AR# 21836

7.1 PlanAhead - Why does the console show an error on my timing constraint?

Description

Keywords: PlanAhead, syntax, constraint,support, log

When I import my ".ucf", I receive an error in the console and the "planAhead.log" that the timing constraint syntax is not supported. What should I do?

Solution

Xilinx recommends following the ucf and edif constraint syntax defined in the Software Manuals.

If you have followed the recommended syntax and these errors are still occurring, please open a WebCase with Xilinx Technical Support:
http://www.xilinx.com/support/clearexpress/websupport.htm
AR# 21836
Date Created 07/28/2005
Last Updated 03/27/2007
Status Archive
Type General Article