[odb-users] base class before derived class

[MM]

Hello,

odb had introduced a defensive failure when the order of base classes and
derived was not expected with regards to when the class is defined, and
when the pragma db object definition is called.
I'm encountering this error.
Is there a general statement that can be made to avoid this failure?

I have the base class, derived, and then later pragmas invoked... Of course
I will put a example snippet, but what is the general idea?