is not a globally static expression

Code:

COMPONENT sacu IS
    PORT(Factor :IN     std_logic_vector;
         MinOut :IN     std_logic_vector;
         MaxOut :IN     std_logic_vector;
         SacuIn :IN     std_logic_vector;
         SacuOut:BUFFER std_logic_vector
    );
END COMPONENT;

CONSTANT 
cMaxOut:std_logic_vector(scaled'RANGE):=(scaled'HIGH-2=>'1',OTHERS=>'0') 
;

CONSTANT 
cMinOut:std_logic_vector(scaled'RANGE):=(scaled'HIGH=>'0',OTHERS=>'0');

 i_sacu:sacu PORT MAP(Factor  => "100000110",
                       MaxOut  => cMaxOut,
                       MinOut  => cMinOut,
                       SacuIn  => SincUpOut,
                       SacuOut => scaled);
....

Fehler:
Actual (constant "cminout") for formal "minout" is not a globally static 
expression.
 Actual (constant "cmaxout") for formal "maxout" is not a globally 
static expression.

Es hat am PC in der Schule funktioniert, daheim am Laptop taucht jetzt 
dieser Fehler auf. Kann mir jemand helfen?? Danke schon mal