This is a bug having to do with unaries in the orginal ORM diagram, and I will be reporting it as such.
Until then, here is why the OIAL to DCIL bombs out.
#error Exception occurred while executing transform 'OIALtoDCIL'. The existing contents of 'ORMModel1.DCIL.xml' will not be modified.
// System.ArgumentNullException
// Value cannot be ...