for $i ( 0 .. $page_counter-1 ) {
  print " ###### HI $i #### \n";
  eval ( "\$Total_Size = \$\#reg_map${i}");
  print " Total Size = $Total_Size\n";
  for $j1 ( 0 .. $Total_Size ) { 
    eval ("\$Num_elements_in_row  = \@\{\$reg_map${i}\[\$j1\]\}");
    print " Num_elements_in_row $j1 is = $Num_elements_in_row\n";
    for $j3 ( 0 .. $Num_elements_in_row ) {
     eval("print \"Bit 1 :\$i:\$j1:\$j3 is  \$reg_map${i}\[\$j1\]\[\$j3\]\n\"");
    }
  }
}

##</code><code>##

 store(\@reg_map, 'file.ext');my $aref = retrieve('file.ext');

##</code><code>##

 
for $i ( 0 .. $page_counter-1 ) {
  print " ###### HI $i #### \n";
  eval ( "\$Total_Size = \$\#aref${i}");
  print " Total Size = $Total_Size\n";
  for $j1 ( 0 .. $Total_Size ) { 
    eval ("\$Num_elements_in_row = \@\{\$aref${i}\[\$j1\]\}");
    print " Num_elements_in_row $j1 is = $Num_elements_in_row\n";
    for $j3 ( 0 .. $Num_elements_in_row ) {
     eval("print \"Bit 2 :\$i:\$j1:\$j3 is  \$aref${i}\[\$j1\]\[\$j3\]\n\"");
    }
  }
}

##</code><code>##

 
open my $wfh, '>', 'file1.ext'
  or die "can't open file for writing: $!";

print $wfh encode_json(\@reg_map);

close $wfh;

open my $fh, '<', 'file.ext'
  or die "can't open file for reading: $!";

my @aref = decode_json(<$fh>);