Excel (excel.exe) is a separate program and does not know about the "current directory" of Perl.

You can get the full path of the current directory by using Cwd::getcwd:

use strict;
use Cwd;

my $dir = getcwd();
my $excelfile = 'UE_NW_Parameters.xlsx';
my $Book = $Excel->Workbooks->Open($dir."\\".$excelfile)
  or die Win32::OLE->LastError();
[download]

Hi.. I can open or access the file but can not use the SaveAs to save the new file In the same path by using the above suggestions. Below is the program and Error I am getting :

Unable to get the SaveAs property of the Workbook class Win32::OLE(0.1712) error 0x800a03ec in METHOD/PROPERTYGET "SaveAs" at E:\Automation Related\Perl Scripts - ALL\I MS_debugging\Final_Scripts\Final_Script_Working\IMS_Debug_Script_V5.pl line 589.

# get already active Excel application or open new
my $Excel = Win32::OLE->GetActiveObject('Excel.Application')
|| Win32::OLE->new('Excel.Application', 'Quit');  

#my $Excel_path = 'Parameters.xlsx';
#print $Excel_path;

#Need to use absolute path for Excel files
#my $excelfile = abs_path("$Excel_path") or die "Error: the file $Exce
+l_path has not been found\n";

#print $excelfile;
# open Excel file
#my $dir = "E:\\Automation Related\\Perl Scripts - ALL\\IMS_debugging\
+\Excel\\";

my $dir = getcwd();
my $excelfile = 'Parameters.xlsx';
my $Book = $Excel->Workbooks->Open($dir."\\".$excelfile)
  or die Win32::OLE->LastError(); 
  
#my $Book = $Excel->Workbooks->Open($dir.$excelfile)
#my $Book = $Excel->Workbooks->Open($excelfile)
#  or die Win32::OLE->LastError(); 

# get keywords
my $kwhashref = get_keywords($Book);  

# create regex
my $match = join '|',map{quotemeta} keys %$kwhashref;
my $re = qr/$match/;
#print $re;

# search files and update workbook
my @files = grep { -f } (<main_log*>);   
for my $file (@files){
  my $line_no = 0;
  print "Reading $file\n";
  open my $fh, '<', $file or die $!;
  while (<$fh>){
    chomp;
    ++$line_no;
    s/ +/ /g;    # remove multiple spaces
    
    # Original
    # # special pcscf_v4 extract addr
    # if (/($re).*addr = ([.\d]+)/){
      # print "Line $line_no kw=[$1] value=[$2] special\n"; 
      # update_sheet($1,$2);
      # next;
    # }
    
    # # match more than 1 per line e.g. usim and isim   
    # while (/($re)[ =]*([.\d]+)/g){
      # print "Line $line_no kw=[$1] value=[$2]\n"; 
      # update_sheet($1,$2);
    # }
    
    if (/($re).*addr = ([.\da-fA-F:]+)/){
    my $msg = update_sheet($1,$2,$_);
      print "Line $line_no $msg special\n"; 
      next;
    }
    
    # match more than 1 per line e.g. usim and isim   
    while (/($re)[ =]*([^,]+)/g){
      my $msg = update_sheet($1,$2,$_);
      print "Line $line_no $msg\n";
    }
    
  }  
  close $fh;
}
#pp $kwhashref; # debug
#my$var = 'updated';
# save as new spreadsheet
my $temp = cwd();

#$Excel->{DisplayAlerts}=0; # This turns off the "This file already ex
+ists" message.
#$Book->Save; #Or $Book->SaveAs("C:\\file_name.xls");
#$Book->Close; #or $Excel->Quit;

$Book->SaveAs($dir.'_updated'.$excelfile);
# working saveas if path is provided 
#$Book->SaveAs("E:\\Automation Related\\Perl Scripts - ALL\\IMS_debugg
+ing\\Final_Scripts\\Final_Script_Working\\temporary.xlsx"); 
# working if given directly as file name. under User/recent/ 
#$Book->SaveAs("temporary.xlsx"); 

#$Book->SaveAs($excelfile.'.xlsx'); 
         
$Book->Close;

# update sheet
# original
# sub update_sheet {
  # my ($kw,$value) = @_;
  # my ($sht,$r,$c) = @{$kwhashref->{$kw}}[0..2];
  # $Book->Worksheets($sht)->Cells($r,$c+1)->{Value} = $value;
  # $kwhashref->{$kw}[3] = $value; # for debugging
# }

sub update_sheet {
  my ($kw,$value,$comment) = @_;  
  my $clean = cleanup($kw,$value);
  
  my ($sht,$r,$c) = @{$kwhashref->{$kw}}[0..2];
  my $sel = $Book->Worksheets($sht)->Cells($r,$c+1);
  $sel->Insert({ Shift => -4161}); # xlToRight
  $sel->{Value} = $clean;
  $sel->AddComment( { Text=> $comment } );
  $sel->Comment->Shape->TextFrame->{ AutoSize } = 1;

  $kwhashref->{$kw}[3] = $value; # for debugging
  $kwhashref->{$kw}[4] = $clean; # for debugging
  return "kw=[$kw] value=[$value] clean=[$clean]";
}


# get keywords
sub get_keywords {
  my ($book) = @_;;
 
  my %word = ();
  for my $sht (1..$book->Worksheets->Count){
    my $Sheet = $book->Worksheets($sht);     
  
    # determine position of keywords
    # $Sheet->UsedRange->Value;
    my $rng = $Sheet->UsedRange->Address( 
            { ReferenceStyle => -4150 } ); # R1C1:R2C2
    my ($r1,$c1,$r2,$c2) = ($rng =~ m/[RC](\d+)/g);
    $r2 = $r2 || $r1;
    $c2 = $c2 || $c1;
    print "Sheet $sht Range $rng r1=$r1 c1=$c1 r2=$r2 c2=$c2\n";
    
    # build keyword hash storing cell position
    for my $c ($c1..$c2){
      for my $r ($r1..$r2){
        my $val = $Sheet->Cells($r,$c)->Value || '';
        if ($val){
          $word{$val} = [$sht,$r,$c]; # sheet row col
        }
      }
    }
  }
  return \%word;
}

# remove unwanted chars from value
sub cleanup {
  my ($kw,$value) = @_;
  
  # generic cleansing
  $value =~ s/[\[\]]//g; # remove all [] brackets
  $value =~ s/^\s+//g;   # remove leading whitespace
  $value =~ s/\s+$//g;   # remove trailing whitespace
  
  # specific cleansing
  #if ($kw =~ //){
    # $value =~ s///g
  #}
  
  # specific cleaning for isim usim sim_invalid
    if ( $kw =~ /^(isim|usim|sim_invalid|pcscf_discovery_flag|signalin
+g_flag|EVS payload type|evs_mode_switch|check_nw_im_cn_signaling_flag
+|is_ems_support|emergency_ind|ran_type|plmn|VT_SUPPORT|WFC_SUPPORT|ra
+t_type:|access RAT|port|integrity_algo|profile.home_uri|profile.imei|
+profile.private_uid|profile.public_uid|ua rat)/ ){
    $value =~ s/(\d+).*/$1/; # remove trailing text
    }
    
  return $value;
}
[download]

Only post a SSCCE. The problem is that OLE::Win32 will not save to a path with forward slashes so you need to convert / to \\ as I showed here.

#!perl
use strict;
use warnings;
use Win32::OLE;
use Cwd;
$Win32::OLE::Warn = 3;      

# get already active Excel application or open new
my $Excel = Win32::OLE->GetActiveObject('Excel.Application')
|| Win32::OLE->new('Excel.Application', 'Quit');  

my $dir = getcwd();

my $excelfile = 'Parameters.xlsx';
my $Book = $Excel->Workbooks->Open($dir."\\".$excelfile)
  or die Win32::OLE->LastError(); 
  
# do work

$dir =~ s!/!\\!g;
$Book->SaveAs($dir."\\".'updated_'.$excelfile);   
$Book->Close;
[download]

poj

This is the same problem as you have when opening a file.

Always use absolute path names when talking to Excel.

What is the error ?

If you add print $Excel->{DefaultFilePath}."\n"; then you will see it is probably set to C:\Users\username\Documents.

Try adding

use Cwd;
my $dir = cwd()."/";
$dir =~ s(/){\\}g;
[download]

Yup! It;s working now! I was Incorrect path and not using $dir =~ s(/){\\}g; thank you!