On 2013-06-17, at 12:05 PM, Christian Prim <christian.prim@gmx.ch> wrote:

Hi list

rendering a very easy formula with greek text in it produces a pdf-document that has not a valid utf-8 string.

I use evince for displaying pdfs under ubuntu linux. The document appears correctly on the screen but stops printing after a greek letter in a formula.

The error-report says:
Internal Error: cairo context error: input string not valid UTF-8

How are you compiling the document (mkii or mkiv) Can you attach the actual PDF as well (small attachments are allowed on the list).

The same document compiled in live.contextgarden.net doesn't produce a mistake and can be printed with evince.

contextgarden uses Mkii rather than Mkiv

Aditya