Errors opening .bpmn files

[jcald1]

I tried to open the bpmn files in the examples directory in Eclipse BPMN Modeler 1.2.4 and Camunda Modeler 1.5.1. Both show errors when opening the files. Below is the error log for task.bpmn in Eclipse. Camuda won't even open the diagram. Eclipse opens task.bpmn but collaboration.bpmn does not display properly, which may be related to the error messages.

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.546
!MESSAGE DocumentRoot id="unknown": Feature 'label' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 6, 60)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.546
!MESSAGE DocumentRoot id="unknown": Feature 'mxCell' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 7, 129)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.546
!MESSAGE DocumentRoot id="unknown": Feature 'label' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 11, 52)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.547
!MESSAGE DocumentRoot id="unknown": Feature 'mxCell' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 12, 70)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.552
!MESSAGE DocumentRoot id="unknown": Feature 'mxCell' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 17, 130)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.552
!MESSAGE DocumentRoot id="unknown": Feature 'label' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 24, 54)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.552
!MESSAGE DocumentRoot id="unknown": Feature 'mxCell' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 25, 127)

!ENTRY org.eclipse.bpmn2.modeler.core 4 0 2016-12-08 17:40:53.552
!MESSAGE DocumentRoot id="unknown": Feature 'mxCell' not found. (file:/usr/apps/das/bpmn/examples/processes/task.bpmn, 30, 130)