Ok. But I refer you to https://perldoc.perl.org/functions/binmode.html.
In general, binmode should be called after open but before any I/O is done on the filehandle.
Yes, there are some exceptions to this "rule". But I figure this "rule" is a good one.

In reply to Re^5: Error binmode() on unopened filehandle by Marshall
in thread Error binmode() on unopened filehandle by RedJeep

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