oldstyle page number

[Frans Goddijn]

Before, I got pagenumbers in oldstyle using:

%%%%%%%%
\stelnummeringin
  [variant=dubbelzijdig,
   plaats={voet,midden},
   letter=\oldstyle]
%%%%%%%%

but in my new and updated version, this \oldstyle is not recognized. If I
change it into
  letter=\oldstylenumerals]
I get this error:

%%%%%%%%%%%%%%%%%%%%%%%%%
! Argument of \oldstylenumerals has an extra }.
.
.
.
<argument> ...tter \c!kleur {\completepagenumber }
                                                  }}
...
l.2 \titel{Inleiding}

?
! Emergency stop.

.
.
.
l.2 \titel{Inleiding}

End of file on the terminal!
%%%%%%%%%%%%%%%%%%%

any ideas?

Thanks!

Frans