I found various threads on the Web from people complaining about Command Not Found errors when using macros that change Word's headers and footers.
The solution seems to be to repaginate every time you change a header/footer pair. (Of course, it could just be a timing issue, but repaginating does seem to work.)
Here is some example VBA code that sets the headers and footers for all sections to match those of the first:
Dim mySection As Section Dim myHeaderFooter As HeaderFooter For Each mySection In ActiveDocument.Range.Sections If mySection.index > 1 Then For Each myHeaderFooter In mySection.Headers If myHeaderFooter.Exists Then myHeaderFooter.LinkToPrevious = True End If Next myHeaderFooter For Each myHeaderFooter In mySection.Footers If myHeaderFooter.Exists Then myHeaderFooter.LinkToPrevious = True End If Next myHeaderFooter End If ActiveDocument.Repaginate ' prevent potential Command Not Available error Next mySection
Repaginate call on the penultimate line I was getting Command Not Found errors when setting
True; with the repagination, it worked okay.