Expression has 32 elements ; expected 16

http://www.alteraforum.com/forum/attachment.php?attachmentid=13168&stc=1

You will find enclosed my code file

I have fixed these errors by passing from vector to unsigned but :(

Here my process :

Plz can you clarify me more about this process

-- purpose: Compute shifts

shift_proc: process (clk, start) is

begin -- process

if start = '0' then

shift_p <= (others => '1');

shift_w <= (others => '0');

p_addr <= to_unsigned(root_addr, 16) + to_unsigned(hash_length, 16);

elsif clk'event and clk = '1' then -- rising clock edge

if leftright = leftright_buf then

shift_p <= resize(2*shift_left, MEM_WIDTH);

shift_w <= shift_w + shift_p;

else

shift_w <= resize(2*shift_left, MEM_WIDTH);

shift_p <= shift_w + shift_p;

end if;

p_addr <= p_addr - shift_p*hash_length;

if leaf='0' then

w_addr <= p_addr - shift_w*hash_length;

else

w_addr <= p_addr - (unsigned(w_beta)/2)*hash_length - (shift_w-(unsigned(w_beta)/2))*block_length;

end if;

end if;

end process;

p_addr <= p_addr - shift_p*hash_length;

w_addr <= p_addr - shift_w*hash_length;

w_addr <= p_addr - (unsigned(w_beta)/2)*hash_length - (shift_w-(unsigned(w_beta)/2))*block_length;