Win32::OLE operating in debugging mode: _Unique => 1
OLE exception from "Microsoft Excel":

Unable to set the HorizontalAlignment property of the Range class

Win32::OLE(0.1709) error 0x80020009: "Exception occurred"
    in PROPERTYPUT "HorizontalAlignment" at C:\Users\boss\Dropbox C:\tmp\merge-center.pl line 11.