You are requiring use Spreadsheet::Read;, but you don't use it. Why?

You are requiring use Text::CSV, but you only use it to instantiate a $csv which you do not use at all!

Did you read any of the manuals of the modules you obviously try to use?

Hint: your print FH ( $wanted_cells -> {Val} ); should be using $csv and the initialisation of $csv should have the eol attribute.

Thank you :) I changed the code to as you mentioned but the CSV file is empty and I am getting an error as below.

#error
Sheet: sheet1
Uncaught exception from user code:
        Expected fields to be an array ref at test_csv_1.pl line 38.
        Text::CSV_PP::print('Text::CSV=HASH(0x348e558)', 'S.no') calle
+d at
test_csv_1.pl line 38
[download]

use strict;
use warnings;
use diagnostics;

use Spreadsheet::XLSX;
use Text::CSV;

 
 
 my $excel = Spreadsheet::XLSX -> new ('Sample.xlsx',);

 my $csv = Text::CSV->new ({eol => "\n"});


 foreach my $sheet (@{$excel -> {Worksheet}})
{

 printf("Sheet: %s\n", $sheet->{Name});

#my @worksheet = qw(sheet1 sheet2);

my $maxrow = $sheet -> {MaxRow};

 my $Minrow = 1;

    my @wanted_cols = (8, 9, 10, 20);
        
        $maxrow ||= $Minrow;

       open FH, ">new.csv" or die "new.csv: $!";
               
         foreach my $row ($Minrow  .. $maxrow) 
              {
                foreach my $wanted_cols (@wanted_cols)
                     {
                         my $wanted_cells =$sheet->{Cells}[$row][$want
+ed_cols];   
                               
                         $csv -> print ( $wanted_cells -> {Val} );
                      }
                      $csv -> print ("\n");
                          
               }
        close FH or die "new.csv: $!";
 }
[download]

You either did not read the docs, or they are still unclear to you. To me even the error message is clear. Text::CSV's print () needs completely different arguments then what you pass.

PLEASE, do us all a favor and read the manuals before you post questions here that appear rather silly.

use warnings;
use diagnostics;

use Spreadsheet::XLSX;
use Text::CSV;

my $excel = Spreadsheet::XLSX->new ("Sample.xlsx");
my $csv   = Text::CSV->new ({ binary => 1, auto_diag => 1, eol => "\n"
+ });

foreach my $sheet (@{$excel->{Worksheet}}) {
    printf ("Sheet: %s\n", $sheet->{Name});

    #my @worksheet = qw(sheet1 sheet2);

    my $Minrow = 1;
    my $maxrow = $sheet->{MaxRow} || $Minrow;
    my @wanted_cols = (8, 9, 10, 20);

    open my $fh, ">", "new.csv" or die "new.csv: $!";

    foreach my $row ($Minrow .. $maxrow) {
        $csv->print ($fh,
            [ map { $sheet->{Cells}[$row][$_]{Val} } @wanted_cols ]};
        }
    close my $fh or die "new.csv: $!";
    }
[download]


Enjoy, Have FUN! H.Merijn