This erroroccurs due to a new DRC check added inISE 13.1 softwareto ensure users have followed the Virtex-6 GTX workaround fixfound in(Xilinx Answer 39456). If you are using an older version of the core, you must implement this work around. In ISE 13.1 software, once thisworkaround isimplemented, the DRC errors will not happen.
This issues is fixed in the v2.3 or laterfor theAXI-Streaming interface or v1.7 or later for legacy TRN interface wrapper available in ISE 13.1 software.
01/18/2012 - Updated; added reference to 45072
03/01/2011 - Initial Release
Note: "Version Found" refers to the version the problem was first discovered. The problem might also exist in earlier versions, but no specific testing has been performed to verify earlier versions.