I didn't try to run your entire code.
I am replying to your question: "How do I declare $fh in subroutine printout so it recognizes the intended filehandle?".

This is not right: $fh=STDOUT unless($fh); Try this instead: 

use strict; # always enable all strictures
use warnings;

my @lines = ("asdf", "xyz");

printout (\@lines);
#
# Default to STDOUT if no file handle specified
#
sub printout {
   my($line_ref,$fh)=@_;
   $fh= *STDOUT unless ($fh); # *STDOUT is a typeglob
   foreach my $line (@{$line_ref}) {
     print $fh "$line\n";
   }
} # End printout;

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In reply to Re: Filehandle in subroutine in use VRML.pm by Marshall
in thread Filehandle in subroutine in use VRML.pm by smittypaddler

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