my %scripts = (
  "010" =>  {
              sub  => \&ACC_GET_STEP,
              step => '010',
            },
  "020" =>  {
              sub  => \&ACC_PUT_STEP,
              step => '020',
            },
  "030" =>  {
              sub  => \&ACC_GET_STEP,
              step => '030',
            },
);

##</code><code>##

$sub = $scripts{$script}{sub} ;
$sub->($file, $step);
# Or 
&$sub($file, $step);