6.1i NGDBuild - Errors regarding the UCF constraining symbols below DDR macro are reported

AR#	17484	Search For Another Answer
Topic	Part Not Listed
Last Updated	02/22/2007
Status	Archive

Description

Keywords: DDR, UCF

Urgency: Standard

General Description:
When I try to implement my design in 6.1i (which has not changed from 5.2i), NGDBuild reports errors related to incorrect instance names.

Solution

In this case, the flip-flops below the DDR macro were mentioned in the UCF in 5.2i and prior; however, in version 6.1i, only the DDR macro name is needed. The flip-flops below the DDR macro are no longer visible to you and cannot be constrained.