Why are tables disappearing when Engineering Logical Entity Hierarchies to Relational

Tables disappearing when Engineering Entity Hierarchies Logical to Relational
We are using 4.0.3.  We have a model with imported from Designer with a number of Entity Hierarchies. 
The model has a three of entity hierarchies (ORD, PLAN and STEP) each with a number of subtypes.  Single tables are built for each of the entity hierarchies and are called (ORD, PLAN and STEP).
If I make a change within an entity hierarchy in the subtype (ORD_METRIC) and forward engineer the only ORD entity hierarchy as single table, the table ORD gets update but the tables STEP and PLAN disappears from the Relational table list.    They only remain if I select all three entity hierarchies when engineering to relational.
Have I a missed selecting an option?

Hi,
in current implementation for entity hierarchies (only) - "engineering to" flag is used also as implementation flag for entity, i.e. if entity is not set to be engineered there will be no implementation as table for that entity in relational model. Attributes of such entity will be implemented in another entity engineered to relational model. If no one entity from hierarchy is engineered (no implementation) then existing corresponding table(s) will be removed.
We'll change it in the future to be less confusing.
Philip

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