Copying the contents to a new document is probably worth trying.
Delete any section breaks, then press Ctrl+A to select the whole
document, press Shift+Left Arrow to deselect the final paragraph
marks, copy and paste into a new document. For more, see the relevant
section of the article at
http://word.mvps.org/faqs/apperrors/CorruptDoc.htm.
For instructions on preserving the tracked changes when copying, see
http://www.shaunakelly.com/word/trac...s.html#Copying.
--
Stefan Blom
Microsoft Word MVP
"news" wrote in message news

In message , Suzanne S.
Barnhill
writes
The duplication of Heading 1 almost certainly results from a manual
page
break before the heading. Delete it and format the heading as "Page
break
before."
No, there was no page break, and all Heading 1 lines are formatted
as
"Page Break Before".
For the rest, do your headings actually use Heading 1 and Heading 2
(built-in styles)?
Yes.
If they use other styles, have you selected these in the
TOC Options?
N/A
Are any of the headings in text boxes?
No.
However, I have now persuaded Word to update the ToC. To do this, I
switched from Print Layout View to Normal View. But instead of
updating
the ToC almost instantaneously, everything froze with the hourglass
showing for over 6 *minutes* before the new ToC appeared!
As I explained originally, this problem only arose after I copied
some
pages from another document. In that other document, ToC update
works
fine.
Weird!
I am now tempted to create a new document and paste the old document
into it, to see if the problem goes away. However, if I do this, how
do
I include the tracked changes in the new document? Readers will need
to
see the changes.
--
Ian