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# 16459

5.2i Incremental Design - Keep_hierarchy constraint causes "ERROR:MapLib:205 - Cannot guide LUT with output xxx..."


General Description:

When I run incremental design after adding the Keep_hierarchy property on area group constraints,the following error occurs:

"ERROR:MapLib:205 - Cannot guide LUT with output ib_w_rst_i because it would enclose a NOMERGE"


To work around this issue, first implement your design in non-incremental flow before re-running incremental flow.

This problem will be resolved in the 6.1i software release, scheduled for August/September 2003.
AR# 16459
Date Created 09/03/2007
Last Updated 12/08/2011
Status Archive
Type General Article