XST Internal error: VHDL constant record support

Hi All,

Just wanted to know if anyone has experienced any problems with Xilinx XST when declaring a constant record in VHDL.

Below is some, what I hope to be valid, VHDL, that makes XST fail and spit out a Internal Error. I'm using ISE 7.1 (SP4) running on a Linux Box.

Is this really an XST bug/problem/deficiency? Would be great to hear from any 8.1 users to see if this is still a problem.

The Error: INTERNAL_ERROR:Xst:cmain.c:3022:1.146.4.1 - To resolve this error, please consult the Answers Database and other online resources at

The VHDL: library ieee; use ieee.std_logic_1164.all; use ieee.numeric_std.all;

entity Test is end entity Test;

architecture General of Test is

type SNAPTYPE_ALU_FLAGS is record zero : std_logic; negative : std_logic; carryBorrow : std_logic; overflow : std_logic; end record SNAPTYPE_ALU_FLAGS;

type SNAPTYPE_INTERNAL_FLAGS is record aluFlags : SNAPTYPE_ALU_FLAGS; equalityTests : std_logic_vector(2 downto 0); globalInterruptEn : std_logic; end record SNAPTYPE_INTERNAL_FLAGS;

constant SNAP_FLAGS_RESET : SNAPTYPE_INTERNAL_FLAGS := ((zero => '0', negative => '0', carryBorrow => '0', overflow => '0'), equalityTests => b"000", globalInterruptEn => '0');

begin end General;

Cheers Andy