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AR# 14161

8.1i ISE - How do I prevent the red question marks that appear for instantiated primitives in the hierarchy of the "Sources in Project" window?

Description

Keywords: VHDL, define, definition

The "Sources in Project" window in Project Navigator displays files with red question marks when I instantiate components that are Xilinx primitives. The red question marks indicate that Project Navigator does not know the definition of the underlying module. Is there a way to prevent the red question marks from appearing for Xilinx primitives?

Solution

Even though a primitive causes a red question mark to appear in the hierarchy, the primitive will be correctly added to the design if it was instantiated correctly. To avoid the question marks, add the following to your VHDL source file and whatever synthesis directives are necessary to prevent the synthesis tool from trying to synthesize the simulation library:

-- synthesis translate_off
library unisim;
use unisim.vcomponents.all;
-- synthesis translate_on
AR# 14161
Date Created 08/29/2007
Last Updated 03/24/2008
Status Archive
Type General Article