As others have mentioned, but not elaborated on, you can achieve all of this in Perl without resorting to Awk. Something like this (not tested)

#!/usr/bin/perl

use strict;
use warnings;

my $dir      = q{/path/to/dir};
my $t_spec   = q{xyz};
my $part_no  = q{123AZ789};
my $chg_lvl  = q{3.2};
my $int_lock = q{LLL};

my $errFile  = qq{/$view_tag/app_hwt/heavy_duty/part_no_update.err};
open my $errFH, q{>>}, $errFile
   or die qq{append: $errFile: $!\n};

my $errFormat = qq{%-13s %10s %7s %5s %4s - %5s\n};
printf $errFH $errFormat,
   $dir,
   $t_spec,
   $part_no,
   $chg_lvl,
   $int_lock,
   q{error};

close $errFH or die qq{close: $errFile: $!\n};
[download]

Hopefully, this will get you started on the task of doing the whole thing in Perl.

Cheers,

JohnGG