> perl hashofhash.pl
"my" variable %newfile_attachments masks earlier declaration in same scope at hashofhash.pl line 17.
$VAR1 = '103496-1';
$VAR2 = {
          'FD' => '0010',
          'COMP' => '1234',
          'CLVD' => '5678',
          'File' => 'text.txt'
        };

Can't use string ("103496-1") as a HASH ref while "strict refs" in use at hashofhash.pl line 19.