We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 32520

11.1 MAP Known Issues - Crash while "Running related packing..."


My design is crashing during Related Packing. I have been able to determine that the crash depends on a KEEPER constraint in my UCF file. Is this a known problem?


This is a known problem that directed packing will crash when an I/O configuration is trimmed to the point where a circuit is reduced to just a PAD and KEEPER. This problem will be fixed in ISE 11.2 so that the PAD and KEEPER are also removed by MAP trimming. Meanwhile, the designer can either remove this I/O configuration or complete the configuration so that the trimming does not occur.

AR# 32520
Date Created 04/20/2009
Last Updated 05/23/2014
Status Archive
Type General Article
  • ISE Design Suite - 11.1