A more idiomatic way to handle this would be to say:

sub cfgToARRAY {                
    my ( $cfgfile ) = @_ ;
    open my $OUTPUT, '<', $cfgfile) or die "Can't open $cfgfile: $!";
    chomp( my @array = <$OUTPUT> );
    return @array;
}

###

my @OUTPUT = cfgToARRAY( "/informatica/scripts/arrayDisplayCDCWFs.cfg"
+ );
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