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AR# 19930

6.3i XST-The TIG constraint does not work in HDL code although the constraint guide specifies it

Description

Keywords: constraint, TIG, HDL, code, NGDBuild, Translate, False, path

I followed the constraint guide to put a TIG constraint, but NGDBUILD does not take it into account or generates an error.

Solution

This is fixed in ISE 7.1i.

In 6.3, the TIG constraint is not supported in the HDL code.

To work around this issue, you can use a "*.xcf" file (synthesis constraint file).
AR# 19930
Date Created 09/03/2007
Last Updated 01/07/2009
Status Archive
Type General Article