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AR# 36343

14.7 Map - ERROR:Pack:2811 - Directed packing was unable to obey the user design constraint

Description


I am receiving the following Map Error message:
 

ERROR:Pack:2811 - Directed packing was unable to obey the user design
constraints (LOC=T33) which requires the combination of the symbols listed
below to be packed into a single IOB component.
The directed pack was not possible because: More than one pad symbol.
The symbols involved are:
BUF symbol "ss_0_OBUF" (Output Signal = ss<0>)
PAD symbol "ss<0>" (Pad Signal = ss<0>)
PAD symbol "ss<1>" (Pad Signal = ss<1>)

Solution

This error occurs when two pins are locked to one site.

Note that two pads are listed under one pin constraint.

The solution is to examine the constraints and remove the conflict.
AR# 36343
Date Created 06/23/2010
Last Updated 09/09/2014
Status Active
Type General Article
Devices
  • FPGA Device Families
Tools
  • ISE Design Suite - 14
  • ISE Design Suite - 13
  • ISE Design Suite - 12
  • ISE Design Suite - 11