If you are on windows, using Win32::OLE to control excel is an option as well. (See Using Win32::OLE and Excel - Tips and Tricks from the Tutorials)

The Q&A node Index of Spreadsheet FAQs has a lot of useful information as well..

In reply to Re: Append text at last of Excel File by davidrw
in thread Append text at last of Excel File by udyog

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