LogiBLOX Version C.19
Copyright (c) 1998, Xilinx Inc.

Running LogiBLOX DRC for Module 'IOBUF1'....
ERROR:LBEngine:30 - IOBUF1 LogiBLOX DRC: An invalid value "1" for attribute
   "BUS_WIDTH" has been detected.  The value cannot be less than "2".  Please
   refer to the LogiBLOX Reference/User Guide for more information on possible
   values for the "BUS_WIDTH" attribute.