Using design 5.4, it seems that the calledElement parameter is not set callActivity elements. You can enter a value in the properties, but it is not written in the bpmn20.xml file. Also, when the value is written in the bpmn20.xml inside eclipse it is silently removed. You can put it there using an external editor (allowing you to fix the file to allow deploying), but as soon as you change something in the designer, it will be lost again.
Joachim
