Continuing with the problem.

• As long as documents are in same folder, relative paths working (so far). Saves a lot of space.
• Testing with other bookmarks shows that INCLUDETEXT works fine across documents.
• The PAGE field works by itself: The bookmark "Test {PAGE} " in Chapter 1 is referred to in Chapter 2 as {INCLUDETEXT "Chap1.doc" Test} and correctly displays as "Test 1" .
• What DOESN'T work is the formula {= {PAGE} + {INCLUDETEXT "Chap1.doc" Test}

Which is of course the whole point of the deal. Sequential page numbering. But at least now I know that it is the formula for creating a page number by adding a previous page number to the current page number that is the problem. Some tricky business with field formulas. Any help would be very welcome!
Hope