Problem when adding/saving a resource constraint
If you open the DSE perspective, select any project (containing a DSE model) and add a resource constraint in the constraint navigator you get a NullPointerException because the PlatfromArchitectureReference is null. Furthermore if you try to save afterwards you get a dangling DanglingHREFException. This might be due to some containment issues in the ecore model.
(from redmine: issue id 2380, created on 2015-07-15, closed on 2015-08-05)