Error 10500 Syntax Error?

Hi there,

could anyone please point out what is wrong with my code as I don't see anything that is wrong with it? It won't compile and is giving me error 10500

code:

library ieee;
use ieee.std_logic_1164.all;
entity sev_seg_deco is
  port
    ( SW : in std_logic_vector(2 downto 0);
       HEX0 : out std_logic_vector(6 downto 0);
end sev_seg_deco;
architecture behav of sev_seg_deco is
begin
 with SW select
 
   HEX0 <= "1110110" when "000",
            "1111001" when "001",
              "0111000" when "010",
              "0111111" when "011",
              "1000000" when others;
              
end architecture behav;

error codes:

error (10500): vhdl syntax error at sev_seg_deco.vhd(9) near text "end"; expecting an identifier ("end" is a reserved keyword), or "constant", or "file", or "signal", or "variable"

Error: Quartus Prime Analysis & Synthesis was unsuccessful. 1 error, 1 warning

Error: Peak virtual memory: 630 megabytes

Error: Processing ended: Sun May 21 17:52:09 2017

Error: Elapsed time: 00:00:09

Error: Total CPU time (on all processors): 00:00:18

Error (293001): Quartus Prime Full Compilation was unsuccessful. 3 errors, 1 warning

Any assistance is greatly appreciated, thank you