Warning: NUMERIC_STD.">=": metavalue detected

helo members ,

i get this warning in questasim ,

Warning: NUMERIC_STD.">=": metavalue detected, returning FALSE,
here count is unsigned vector ..

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for i in 0 to 2 generate

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process(clk,rst)

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 if(rst)then

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

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 elseif rising_edge(clk)then

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  if((count(i)>=to_unsigned(0, count(i)'length))

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..

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 end if;

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end if;

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end process

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end generate

how can this be solved. i assigned initial values dueing signal count 
initialisation and during reset still gettind same error