Rodolfo Medina a écrit :
> Thanks for your suggestion. But you didn't say how to define \doleftmark and
> \dorightmark.
>
> Rodolfo
>
Indeed. The lines
\doleftmark#1#2{#1}
\dorightmark#1#2{#2}
were lacking a \def:
\def\doleftmark#1#2{#1}
\def\dorightmark#1#2{#2}
Paul