Paul has identified the flaw in your requirement, however you may find http://www.gmayor.com/BookmarkandVariableEditor.htm (Content Control Editor Version) useful in identifying similarly named content controls and as an aid to changing their values, and/or deleting unwanted controls.

If you want controls to duplicate values in controls in different parts of the document, then the controls should be mapped and cross referenced. This will do that also.

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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