Having difficulty coming-up with what the prototype for my sub might look like. If coded as is (below), the sub works; the caller sends named parameters, the sub checks for useful data, does the caller's bidding. A sample of things I've tried for prototypes are:

sub ConfigRead($ @ %);
sub ConfigRead(;$ @ %);
sub ConfigRead($ \@ \%);
sub ConfigRead(;$ \@ \%);
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My actual code without the prototype resembles this:

#!/usr/bin/perl -w
use strict;

my @aFieldHeaders;
my %hFieldConfigs;

my $sConfigFile = 'mydata.csv';
ConfigRead(sFILE => $sConfigFile,
           apHEAD => \@aFieldHeaders,
           hpFIELDCONF => \%hFieldConfigs);

# my array and hash now have some cool stuff in 'em!


sub ConfigRead {
    my %hArgs = (
        sFILE    => 'BAD',      # lazy user alert! whine & die
        apHEAD  => 'BAD',       # ^^^ see comment above
        hpFIELDCONF => 'BAD',   # by now you know the drill!
        @_,                     # user demands come from here
    );
    
    # stick some cool stuff in their variables
}
[download]

Suggestions, solutions and/or winning lottery ticket numbers for Wednesday's drawing gratefully accepted!