The model which contains an unused label type with value constraints will prevent CaseTalk to generate an ERD in the background, or execute a model transformation. Once the label type is manually deleted, it'll work fine again.
Model well-formedness checks for this, but does not raise it as an error.
The transformation code attempts to remove the label type, but left some VCparts behind.
This is now fixed by properly removing the label type and constraints.
