Spreadsheet::WriteExcel tries to close your workbook automatically but sometimes has problems "If the new(), add_worksheet() or add_format() methods are called in subroutines." You can read the section on the close() method for more detail on limitations of automatic closing.

In reply to Re^3: Not able to create worksheets inside a subroutine by ig
in thread Not able to create worksheets inside a subroutine by devbond

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