This is a typical bug of word. Reason is that there are some area in the word
file are bad.
Solution:
1. Open an new word file. Select all, then copy and paste all the old doc into
the new one. Try to save the new one. This sometime time will work.
2. If the first not work. Open an new word file. Select page by page and copy
them to the new file. After every copy try to save it and see whether the
error occur. Do this until you find exactly where the bad area. Then copy all
the good area to a ne
