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# 41988

13.4 - "ERROR:Place:1318 - User has over-constrained component ..."


The following error occurs:

"ERROR:Place:1318 - User has over-constrained componentinst_clkin/rx_bufpll_inst. There are no placeable sites that satisfy the user constraints. Please review the user constraints on the driver component andthe load components of inst_clkin/rx_bufpll_inst."

I am not sure where the restriction lies. How do I resolve this issue?


BUFPLL needs to have all of its IOB loads placed into the same I/O bank. This error occurs if the user-specified LOC constraints violate this rule.

To resolve the error, make sure all the IOB loads of the BUFPLL instance are locked to the same bank.

AR# 41988
Date Created 03/21/2012
Last Updated 05/19/2012
Status Active
Type Error Message
  • Spartan-6 LX
  • Spartan-6 LXT
  • Spartan-6Q
  • ISE Design Suite - 12.1
  • ISE Design Suite - 12.2
  • ISE Design Suite - 12.3
  • More
  • ISE Design Suite - 12.4
  • ISE Design Suite - 13
  • ISE Design Suite - 13.1
  • ISE Design Suite - 13.2
  • ISE Design Suite - 13.3
  • Less