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AR# 17484

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

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.
AR# 17484
Date Created 06/20/2003
Last Updated 02/21/2007
Status Archive
Type General Article