This is my first project with vhdl, and I am having a terrible problem. the synthesis tool says--
FATAL_ERROR:Xst:Portability/export/Port_Main.h:143:1.17 - This application has discovered an exceptional condition from which it cannot recover. Process will terminate. For technical support on this issue, please open a WebCase with this project attached at http://www.xilinx.com/support.
the attachment contains a design unit for hamming weight calculation.
the design calculates number of ones and zeros and stores respective position in 2 separate memories.