Expandplf_updates.txt:-
/****************************ORPHANED FILES***************************/
  //source/modem/hdr/cp/rel/07.01.00.13.20/inc/hdr.c#2 
 //source/modem/hdr/cp/rel/07.01.00.13.20/inc/hdrscmgmmcdp.h#2 
/*************************** FILES IN VU's***************************/
 /******************************* PLF's******************************/
 
my $expand_line = <Expandplf_updates.txt>;
open my $FH, '<', "$expand_line" or die "could not open $expand_plf - $!"; 
while (<$FH>) {
	chomp;
        print "IN\n";
    next unless ( m:(\/\/.+?)#(\d+)$: );//why is the above input not matching this line.

    print "\nMATCH DATA:$1 $2";//doesnt print this