Khen1950fx: thanks for you reply. But it seems that your solution is a workaround the problem. If, on the original system, everything is working fine, why should I say?: no strict qw/subs/;
In my opinion, we should try to find out why use Win32::OLE::Const 'Microsoft Excel'; is not taking an effect on the XP system. For example, maybe XlExcel8 is defined for Excel 2010 (which is installed on the original system), and has a different name in Excel 2003 (installed on the Windows XP system)? (Just an example)?