BMM model problem

Hi experts,
In Physical Layer, I defined 4 tables :
- Product Category
- Product Category Fact
- Product
- Product Fact
I drag and drop all the 4 tables from Physical Layer to Business Model and Mapping Layer. Then I build complex joins among the tables as below:
1) Product Category (Dim) -> Product (Dim) -> Product Fact (Fact)
2) Product Category (Dim) -> Product Category Fact (Fact)
Then I further drag and drop all the 4 tables from BMM Layer to Presentation Layer. Then I use OBIEE Answer to start query.
However , I got error when querying columns from Product Category and Product Category Fact.
Does OBIEE support this kind of logical structure?
Case 2:
Tables:
- Product
- Product Fact 1
- Product Fact 2
Logical Join:
Product (Dim) -> Product Fact 1 (Fact)
Product (Dim) -> Product Fact 2 (Fact)
When I query columns from Product Fact 1 and Product Fact 2 (no column from Product), also fail. Any way to achieve so??
Thanks.

what error are you getting?

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