Try closing your workbook explicitly.
package excelUtil;
use Exporter;
use strict;
use Spreadsheet::WriteExcel;
use vars qw(@ISA @EXPORT);
@ISA = qw(Exporter);
@EXPORT = qw(writeCell close_workbook);
## Excel workbook
my $workbook = Spreadsheet::WriteExcel->new("Sample.xls");
## worksheet
my $worksheet = $workbook->add_worksheet("test");
## Functions
sub writeCell {
my ($row, $col, $str) = @_;
print "Writing Cell \n";
$worksheet->write($row, $col, $str);
}
sub close_workbook {
print "Closing workbook\n";
$workbook->close();
}
writeCell(1, 2, "testing, Row-1, Col-2");
1;
#!/usr/bin/perl
use excelUtil;
writeCell(1, 1, "Testing, Row-1, Col-1");
close_workbook;
Edit: corrected my cut and paste error for the second block (which was a duplicate of the first), as noted by soonix - many thanks! What you suggest is exactly what I intended.