Boyum Pack issue - The stub received bad data. (Exception from HRESULT: 0x800706F7) [When doing a letter merge]

The stub received bad data -error usually looks like this:

This is a Microsoft COM Bug that can happen in rare cases. The problem is not related to SAP Business One and/or B1UP in any way. For more information on the cause and solution of this please see the following website: http://support.microsoft.com/kb/292744/en-us