On Tue, 11 Oct 2011, Aditya Mahajan wrote:

On Mon, 10 Oct 2011, Aditya Mahajan wrote:

...

Compiling the following document

~~~ \definehighlight [object] [style=mono]

\setupbackend [export=yes]

\starttext \object{test} \stoptext ~~~

gives

backend > export > saving xml data in 'test.export backend > export > saving css image definitions in 'test-images.css backend > export > saving css style definitions in 'test-styles.css ! LuaTeX error bad argument #3 to '?' (value expected).

system > tex > error on line 0 in file : LuaTeX error ...

<empty file>

<*> ./test \stoptext

Quick workaround: use \definestartstop instead of \definehighlight.

The "bug" is with xml.css.fontspecification function that does not handle style=mono (or sans and serif for that matter). The proper solution is to convert from context font specification into html font specification for all styles. Aditya