"I am using Perl 5.24.0."

There isn't any version issue: that was my mistake. See my "Update (additional information)", which I posted after you replied.

I note your other issue has been resolved[1, 2 & 3].

— Ken

In reply to Re^3: Using an IO::File object stored in a Hash. by kcott
in thread Using an IO::File object stored in a Hash. by jjs04

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