On 2013–02–15 Mikael P. Sundqvist wrote:

> with the (almost minimal) example below,

I reduced your minimal example slightly further:

\startuseMPgraphic{figram}
  StartPage; fill Field[Text][Text]; StopPage;
\stopuseMPgraphic

\starttext
  \useMPgraphic{figram}
  
  %% using the graphic a second time fails
  %% \useMPgraphic{figram}
\stoptext

> I hoped that the frame would be recalculated at every page.

That's not how uniqueMPgraphics work.


Marco