What EXACTLY is it that you think this code is trying to achieve?
What sort of 'fields' are involved.
If you want to call bookmarks and go to them then call them by name.
If you want to move between fields F11 is pre configured to do that.
If you want to change the contents of a bookmark then see the FillBM function you can find on my web site.

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Graham Mayor - MS MVP (Word) (2002-2019)
Visit my web site for more programming tips and ready made processes www.gmayor.com