Hi Alan,

> On 30 Sep 2020, at 12:50, Alan Bowen <bowenalan03@gmail.com> wrote:
>
> he page counter does not increase in the first iteration an PDf inclusion but seems to work properly after that. Have attached a sample file (69K) that will serve to show the problem—at least, on my machine.

It is not the iteration itself. Try with another pdf with more than 2 pages and you
will see that it happens in the first page(s).

The problem is that you are not giving ConTeXt a fair chance to update the page number,
because a series of \vbox to \paperheight {}’s cannot cleanly be broken into separate
pages. The solution is to use

\dorecurse{\noffigurepages}
   {\vbox to \paperheight
                {\vskip-\dimexpr\headerheight+\headerdistance+\topspace\relax
                 \hbox to \hsize
         {\hskip-\backspace
                \layeredtext[]
                        [boffset=3pc]           
                {\red\userpagenumber}
                {\externalfigure[HannahBW.pdf][page=#1]}%
          \hss}%
                \vss}\page
  }

where the extra \page command allows ConTeXt to properly process the page breaks.

Best wishes,
Taco

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