Thanks for the advice. A couple of my variables were undefined because I declared them like so " my $row = ( );" which I guess PERL doesn't like.

However, I still get the same error at the same line. So I tried to redefine "my $workbook = 0;" and "my $worksheet = 0;" since they were both set " = ( ); ". and it still doesn't work.

Is there another way I should define "my $worksheet" (other than = 0) if it is doing this: ?
< my $worksheet = $workbook->add_worksheet("data"); > and
< $worksheet->write($row,$col,$temp); >