Broadly speaking, a Mail Merge Main Document is either set p as a "Letter"
merge or a "Directory" merge (if you start from Outlook, "directory" merges
are still described as "Catalog" merges).
1. If you have a "Letter" merge and you are outputting to a new document,
each new record in the data source results in a new Word Section. You can't
avoid that, and if you need to remove those section breaks, you have to
postprocess the output document in some way, e.g. using VBA.
2. If you have a "Directory" merge, you have to output to a new document,
and each new record in the data source results in a document chunk that
follows the previous one, without a section break, which sounds, on the face
of it, like what you want.
3. However, if your Mail Merge Main Document "contains a table", then the
chances are that what you are looking for is something that
a. outputs some heading material
b. creates a table with one row for each row in the data source
c. outputs some trailer material
and unfortunately that is not straightforward to achieve in Word MailMerge,
partly because table-and non-table materials do not mix very well.
Maybe you could say whether you are trying to do something like (2) or
something like (3)?
Peter Jamieson