Description
Saving in Camille tries to ignore (i.e. preserve) iUML-B state-machines (even though they appear to have been deleted because there is no text representation). However, a transition's source/target references have an eOpposite relation with States incoming/outgoing references. Only the incoming/outgoing references are preserved; the source/target references are deleted resulting in an invalid model.
Before saving with Camille:
After saving a change in Camille:
Looking with Rose editor reveals missing properties source and target:
The model can be repaired by deleting and re-writing the incoming/outgoing properties of the states. (which automatically updates the source/target properties since they are eOpposite).
N.b. there are other eOpposite relationships in e.g. Class diagrams etc.