#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;
use re 'debug';
my $file= "//depot/asic/msmshared/users/QTVOEMDrops/7600/3555473R/qtv/
+player/audioplayer/audiocmx.cpp";
my $update_p4where=`p4 where $file`;
#print "$update_p4where";
my $update_p4filelog=`p4 filelog $file`;
print "$update_p4filelog\n";
my $update_base_branched_p4path = $update_p4filelog =~ /branch\sfrom(.
+*\/(.*))\#\,(\#\d+)$/xmsg;
print "$update_base_branched_p4path\n";
[download]

Compiling REx `branch from(.*/(.*))\#,(\#\d+)$' size 30 first at 1

1: EXACT <branchfrom>(5) 5: OPEN1(7) 7: STAR(9) 8: SANY(0) 9: EXACT </>(11) 11: OPEN2(13) 13: STAR(15) 14: SANY(0) 15: CLOSE2(17) 17: CLOSE1(19) 19: EXACT <#,>(21) 21: OPEN3(23) 23: EXACT <#>(25) 25: PLUS(27) 26: DIGIT(0) 27: CLOSE3(29) 29: MEOL(30) 30: END(0)

anchored `branch' at 0 floating `#,#' at 12..2147483647 (checking anchored) minlen 16

Guessing start of match, REx `branch\sfrom(.*/(.*))\#,(\#\d+)$' against `//depot/asic/msmshared/users/QTVOEMDrops/7600/3555473R/qtv/p...'...

Found anchored substr `branch' at offset 219... Contradicts floating substr `#,#', giving up...//Why is it giving up?why isn't it goint to the next line??

Match rejected by optimizer Freeing REx: `branch\sfrom(.*/(.*))\#,(\#\d+)$'

use YAPE::Regex::Explain;
print YAPE::Regex::Explain->new(
    qr/branch\sfrom(.*\/(.*))\#\,(\#\d+)$/xms
)->explain
__END__
The regular expression:

(?msx-i:branch\sfrom(.*/(.*))\#\,(\#\d+)$)

matches as follows:

NODE                     EXPLANATION
----------------------------------------------------------------------
(?msx-i:                 group, but do not capture (with ^ and $
                         matching start and end of line) (with .
                         matching \n) (disregarding whitespace and
                         comments) (case-sensitive):
----------------------------------------------------------------------
  branch                   'branch'
----------------------------------------------------------------------
  \s                       whitespace (\n, \r, \t, \f, and " ")
----------------------------------------------------------------------
  from                     'from'
----------------------------------------------------------------------
  (                        group and capture to \1:
----------------------------------------------------------------------
    .*                       any character (0 or more times (matching
                             the most amount possible))
----------------------------------------------------------------------
    /                        '/'
----------------------------------------------------------------------
    (                        group and capture to \2:
----------------------------------------------------------------------
      .*                       any character (0 or more times
                               (matching the most amount possible))
----------------------------------------------------------------------
    )                        end of \2
----------------------------------------------------------------------
  )                        end of \1
----------------------------------------------------------------------
  \#                       '#'
----------------------------------------------------------------------
  \,                       ','
----------------------------------------------------------------------
  (                        group and capture to \3:
----------------------------------------------------------------------
    \#                       '#'
----------------------------------------------------------------------
    \d+                      digits (0-9) (1 or more times (matching
                             the most amount possible))
----------------------------------------------------------------------
  )                        end of \3
----------------------------------------------------------------------
  $                        before an optional \n, and the end of a
                           "line"
----------------------------------------------------------------------
)                        end of grouping
----------------------------------------------------------------------
[download]

I did try this,couldnt find any thing,I will keep trying but incase if someone finds any fault please let me know