UPGRADE YOUR BROWSER

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# 19771

6.2i NGDBuild - "WARNING:NgdBuild:488 - Attribute value "...." is not an accepted value for attribute "BEL" on "....""

Description


General Description:

When the BEL constraint is used to control the packing of IOB flip-flops into one of the following BELs, the following warning is generated by NGDBuild (Translate):



IFF1, IFF2, OFF1, OFF2, TFF1, TFF2



"WARNING:NgdBuild:488 - Attribute value "...." is not an accepted value for attribute "BEL" on "....""

Solution


You can safely ignore these warnings. These warnings will not appear in future software releases.



IFF1, IFF2, OFF1, OFF2, TFF1, TFF2 are valid elements for use with the BEL constraint.



NGDBuild should suppress such warnings.
AR# 19771
Date Created 09/03/2007
Last Updated 06/16/2011
Status Archive
Type General Article