On 01/10/2015 12:21 PM, Wolfgang Schuster wrote:

...

Am 10.01.2015 um 11:40 schrieb Pablo Rodriguez: [...] Is this a bug or am I missing something?

ConTeXt expects a dimension (e.g. 1cm) as argument for the header key but since this is missing here you get a error message for this:

! Missing number, treated as zero

Many thanks for your reply, Wolfgang. I had the impression that this worked for me in the past. But it is clear that I was mixing it with other options not requiring dimensions. Many thanks for your help, Pablo -- http://www.ousia.tk