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# 39901

12.4/13.1 MAP - "ERROR:Pack:2811" is complaining BLKNM constraint is unable to obey but there is no BLKNM constraint in the netlists and the UCF/NCF

Description


The following error occurred during the MAP process.

ERROR:Pack:2811 - Directed packing was unable to obey the user design
constraints (BLKNM=5) which requires the combination of the symbols listed
below to be packed into a single SLICE component.

The directed pack was not possible because: There are more than four XORCY
symbols.

The symbols involved are:
XorCY symbol
"s5pe100x/DESIGN0/ISP_WRAP/ISP_BLK/FIMC_IS/IS_CORE/ISP_CHAIN/FIMC_DIS/du_top/
fu/gme/sad/un15_curr_sad_8_0_cry_8_outext" (Output Signal =
s5pe100x/DESIGN0/ISP_WRAP/ISP_BLK/FIMC_IS/IS_CORE/ISP_CHAIN/FIMC_DIS/du_top/f
u/gme/sad/un15_curr_sad_8[9])
LUT symbol
"s5pe100x/DESIGN0/ISP_WRAP/ISP_BLK/FIMC_IS/IS_CORE/ISP_CHAIN/FIMC_DIS/du_top/
fu/gme/sad/un15_curr_sad_6_0_axb_4_lut6_2_o5" (Output Signal =
s5pe100x/DESIGN0/ISP_WRAP/ISP_BLK/FIMC_IS/IS_CORE/ISP_CHAIN/FIMC_DIS/du_top/f
u/gme/sad/un15_curr_sad_6_0_axb_4_lut6_2_O5)
LUT symbol
"s5pe100x/DESIGN0/ISP_WRAP/ISP_BLK/FIMC_IS/IS_CORE/ISP_CHAIN/FIMC_DIS/du_top/
fu/gme/sad/un15_curr_sad_6_0_axb_4_lut6_2_o6" (Output Signal =
s5pe100x/DESIGN0/ISP_WRAP/ISP_BLK/FIMC_IS/IS_CORE/ISP_CHAIN/FIMC_DIS/du_top/f
u/gme/sad/un15_curr_sad_6_0_axb_4)

...... (hundreds of XorCY/LUT symbols listed here)


The Synthesis tool is Synplify Pro.

However, there is no BLKNM constraint in the top level and submodule netlists or the UCF/NCF files.

What is the problem?

Solution

A cause of this error can be if "COMP" is used in the HDL code.

For example:

localparamCOMP...


COMP is an obsolete Xilinx property. 
 

It is incorrectly converted to BLKNM by the tool. 

To workaround this issue, do not use "COMP" in the HDL code.

This issue has been resolved in ISE 13.2 and later.

AR# 39901
Date Created 12/28/2010
Last Updated 09/11/2014
Status Active
Type Error Message
Tools
  • ISE Design Suite - 12.4
  • ISE Design Suite - 13.1