To be clear, I am not setting the RMA value (I don't think I can). I have added a rule something like:
BO.RelatedAttribute=LoggedInBO.RelatedAttribute
This works. BO_REN receive proper values as does BO_RID. But BO_RMA does not. When the object is added from a form when the relationship is in context, the value for BO_RMA receives a value which is the name of the BO. Without that value, the item does not appear in the list on my form. If I add a value there, it does.
My work-around so far is to set a specific query for that list;
BO.ID = ThisBO.ID which works fine.
This is a deal where a BO has two owners. In this case I am trying to set the value of the second owner which is not in context at create time.