"Thanks for your reply ..."

Thanking me is all well and good; however, as far as I can see, you've completely ignored every point and recommendation I made.

As you've provided some more code and input data, here's my best guess at the type of thing you want:

#!/usr/bin/env perl

use strict;
use warnings;
use autodie;

my $report_file = 'pm_1080084_timing_manual.rpt';
my %PG;
local $/ = "\nStartpoint";
open my $fh, '<', $report_file;
while (<$fh>) {
    /[(](\w+)[^(]+[(](\w+)[^:]+:\s+(\w+).*?slack[^-]+(-\d+)/s;
    $PG{$3}{"$1-$2"} = $4; 
}   

use Data::Dump;
dd \%PG;
[download]

This outputs:

{
  PLBCLK  => { "input-output" => -4, "rising-output" => -3 },
  PLBCLK1 => { "input-rising" => -1, "rising-rising" => -2 },
}
[download]

If you choose to ignore the points I raise, the links I provide, and the recommendations I make, that's fine. Of course, it would be a waste of my time to offer further help if it's going to be ignored.

The regex has no syntax that was added after Perl version 5.6, so YAPE::Regex::Explain may be helpful.

c:\@Work\Perl\monks>perl -wMstrict -le
"use YAPE::Regex::Explain;
 ;;
 my $rx = qr/[(](\w+)[^(]+[(](\w+)[^:]+:\s+(\w+).*?slack[^-]+(-\d+)/s;
 ;;
 print YAPE::Regex::Explain->new($rx)->explain;
"
The regular expression:

(?s-imx:[(](\w+)[^(]+[(](\w+)[^:]+:\s+(\w+).*?slack[^-]+(-\d+))

matches as follows:

NODE                     EXPLANATION
----------------------------------------------------------------------
(?s-imx:                 group, but do not capture (with . matching
                         \n) (case-sensitive) (with ^ and $ matching
                         normally) (matching whitespace and #
                         normally):
----------------------------------------------------------------------
  [(]                      any character of: '('
----------------------------------------------------------------------
  (                        group and capture to \1:
----------------------------------------------------------------------
    \w+                      word characters (a-z, A-Z, 0-9, _) (1 or
                             more times (matching the most amount
                             possible))
----------------------------------------------------------------------
  )                        end of \1
----------------------------------------------------------------------
  [^(]+                    any character except: '(' (1 or more times
                           (matching the most amount possible))
----------------------------------------------------------------------
  [(]                      any character of: '('
----------------------------------------------------------------------
  (                        group and capture to \2:
----------------------------------------------------------------------
    \w+                      word characters (a-z, A-Z, 0-9, _) (1 or
                             more times (matching the most amount
                             possible))
----------------------------------------------------------------------
  )                        end of \2
----------------------------------------------------------------------
  [^:]+                    any character except: ':' (1 or more times
                           (matching the most amount possible))
----------------------------------------------------------------------
  :                        ':'
----------------------------------------------------------------------
  \s+                      whitespace (\n, \r, \t, \f, and " ") (1 or
                           more times (matching the most amount
                           possible))
----------------------------------------------------------------------
  (                        group and capture to \3:
----------------------------------------------------------------------
    \w+                      word characters (a-z, A-Z, 0-9, _) (1 or
                             more times (matching the most amount
                             possible))
----------------------------------------------------------------------
  )                        end of \3
----------------------------------------------------------------------
  .*?                      any character (0 or more times (matching
                           the least amount possible))
----------------------------------------------------------------------
  slack                    'slack'
----------------------------------------------------------------------
  [^-]+                    any character except: '-' (1 or more times
                           (matching the most amount possible))
----------------------------------------------------------------------
  (                        group and capture to \4:
----------------------------------------------------------------------
    -                        '-'
----------------------------------------------------------------------
    \d+                      digits (0-9) (1 or more times (matching
                             the most amount possible))
----------------------------------------------------------------------
  )                        end of \4
----------------------------------------------------------------------
)                        end of grouping
----------------------------------------------------------------------
[download]

Update: Also see davido's on-line Perl Regular Expression Tester for post-5.6 syntax.

Begging you pardon, I cannot see the Perl question in your last post.

Edit: maybe you clarify what the difference between those text blocks is (it is not apparent to me)
or even better: mention the small misconception or the detail that does not work in your favour and what you expected it to do.

Cheers, Sören

Créateur des bugs mobiles - let loose once, run everywhere.
(hooked on the Perl Programming language)