@Elaine Tucker has support provided a solution for this? I experienced the same thing today. There's a knowledgebase article that states that they know of this error and will update once a solution has been found.
@Ohyong Baliat since Blackbaud removed the integration with Microsoft word and excell, I don't believe you can do this directly from database view any longer. We just sent out our Tax Letters using the receipting function in database view in which we created our data merge files from there and then emailed them out using the mail merge to PDF email function in microsoft word.