You seem to be changing a program without understanding it or understanding what it is supposed to do. This is a problematic and dangerous practice.

The error message is output by the script itself, in the sub Dispatch, whenever it does not find a supported platform. If you had run your program with warnings enabled, like I suggested when you last posted, Perl would have told you that you used a variable which was not initialized. In this case, it is $ENV{PLATFORM}, most likely, because you did not set the PLATFORM environment variable.

You could change Dispatch like this to make the program give you a more explicit error message:

sub Dispatch
{
   if ( exists( $Platforms{ lc( $ENV{PLATFORM} ) } ) )
   {
      print "\nProduct $Product - Platform $ENV{PLATFORM} supported!\n
+";
   }
   elsif (defined $ENV{PLATFORM})
   {
      print "\nProduct $Product - Not implemented ".
            "for platform $ENV{PLATFORM}\n";
      return;
   } else {
      print "\nThe environment variable PLATFORM was not set.\n";
      return;
   }

   my $FnTable = $Platforms{ lc( $ENV{PLATFORM} ) };
   for ( @ARGV )
   {
      if ( exists( $FnTable->{ lc( $_ ) } ) )
      {
         print "\nProduct $Product - Platform $ENV{PLATFORM} - Functio
+n $_\n";
         $FnTable->{ lc( $_ ) }();
         $Options = '';
      }
      else
      {
         $Options .= " $_";
      }
   }

  print "\n";
}
[download]

The code also seems to be somewhat problematic or weird, because it calls the functions Checkout, Clean and Build when building the hashes; at least assuming you left out the definitions of these subroutines. Otherwise, if these are to be strings, you should put them into quotes to clearly mark them as strings.