Problem: When attempting to create a relationship between different types of MBOs, a warning message is displayed.
Explanation: A relationship between a normal MBO and a structure is not allowed; and a relationship between a normal MBO and a local business object is not allowed. Relationships can be created only between normal MBOs, or between local business objects. No cross-over cases are supported.
Solution: Create a relationship between normal MBOs, or between local business objects.