Stavors:
Many Word experts caution against the use of the Master Document feature.
Evidently, master documents can easily become corrupted and can irreversibly
corrupt your subdocuments.
I hate to simply parrot such warnings. My own experience with master
documents was not horrible. Over the course of a year, I had only one
catastrophic crash, which did minor damage to two or three of my twelve
subdocuments.
I work in a meticulously clean way, though, and deleted unneeded section
breaks immediately on creating the master document. I did not nest
subdocuments as you are doing.
At the very least, you should consider your subdocuments at higher than
normal risk, and back them up rigorously.
Steve Hudson offered these guidelines for using master documents.
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Steve's Golden Rules of Master Documents:
Rule 1 - No text OTHER than the auto-toc and auto-index in your master.
Rule 2 - Do NOT perform editing via expanded sub-docs from your master -
enter the sub's directly from the file system
Rule 3 - Delete all auto-section breaks.
Rule 4 - Master and subs must have the same template.
Rule 5 - If you change your template styles, rebuild your docs.
Rule 6 - To x-ref twixt separate documents, ignore Rule 2.
Rule 7 - Regularly throw your master out and start again. This is why you
keep the toc in the master, you print it out without updates to use as your
rebuild guide.
Rule 8 - Only create and load the master doc at publishing time where
possible.
Rule 9 - Do NOT save changes after publishing. IE - Get your subbies perfect
beforehand, and forget the updated links etc from the print process. Unwanted
corruption can get saved back into the files.
Rule 10 - Use version control software such as VSS for complete peace of mind.
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In other words, Steve pretty much just used master documents as temporary
assemblies of the subdocuments. He created them just to perform specific,
limited operations, including publication.
Bear

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Windows XP, Word 2000