How to filter on attribute in child entityType, but return rows of parent entityType?

Hi,

I'm having an issue with a filter.

I have 2 entity types, 1 parent and 1 child.   My requirement is to enable a filter on an attribute at the child level, but return a list of parents.  The list will show parents that has a child(s) with the filter value.

When I attempt to use the filter, NetWeaver Gateway returns an error indicating that the attribute does not exist in the entityType (the parent).

How do I solve this requirement?

Thank you for any input!

Kevin