use Module 1.0; 

##</code><code>##

use Module 2.0;

##</code><code>##

package Module;
our ($VERSION, @EXPORT, @ISA);
use Exporter;
@ISA=qw#Exporter#;
$VERSION = q#1.0#;

sub routine1 {
  print "This is version: $VERSION\n";
}

$VERSION = q#2.0#;

sub routine1 {
  print "This is version: $VERSION\n";
}

1;