Export BPMN to an image or pdf

Hi @wwitt,
I tried this and got it basically working. Unfortunatelly data objects are not rendered in the final png. Do you know why this is?

what I did: model a simple bpmn process and add some data objects to the tasks. Then I generated the image with the method you suggested.
As you can see in the picture there is only a dotted line where a data object should be. Other data objects with a data association are completely lost including the association line.

Greetings
Simon