Exactly! I apologise exceedingly! -- I was watching my files' content encoding always, but this time i missed it. Please pardon me!

Now, how do i tell PERL to warn me on opening non-UTF8 file's content?

I used:

use utf8::all;
open $fh, '<', $file || die "sopen: Cann't open  $file  $!";
binmode $fh, ':encoding(UTF-8)';
do{
$cont.=<$fh>;
}until( eof( $fh ) );
close $fh;
[download]

But it keeps saying:

utf8 "\xB4" does not map to Unicode at ...