The following error occurs in NGDBuild:
"ERROR:Ngd:788 - NGD file version is !%1!.!%2!. The tool was expecting version !%3!.!%4!."
If your NGD file was created with an older version of the Xilinx tools, you must rerun your design using the newer tools.
If you have created the NGD file in a newer version of the software, you cannot use that NGD file in an older software version. The NGD file from the newer version is not compatible with past software versions.