unifier manager is empty in mixed node

Hi experts,

I created a mixed node for the Attributes of an tablelike  Assignmentblock. The collection of the mixed node is filled correctly with the information of the entity and the extra structure. The problem is, that the extra Attributes are empty in the Assignmentblock.

I debugged and got the following information.

In get_xxx Method i get the wrong entity. current = collection_wrapper->get_current( ).

the collection_wrapper hast a collection_reference to cl_bsp_wd_2collection_wrapper (my Class for my mixed node)

There I have the attributes CL_BSP_WD_COLLECTION_WRAPPER  with the Attribut COLLECTION_REF (this collection ref is filled with all my data correctly) and the attribute CL_BSP_WD_2COLLECTION_WRAPPER with the attribut UNIFIER_MANAGER which collection is empty.

Now, how can i get the correct current collection or how can i fill the collection of the unifier manager?

Thanks and regards,

Sebastian