Problem creating hierarchy based on 2 physical dimension tables

I'm having a problem creating 1 logical dimension with a drill-down hierarchy, based on two separate physical dimension tables. The errors I receive when navigating the drill-down hierarchy is:
"Cannot find logical table source coverage for logical columns" &
"Missing join between logical tables".
I'm using OBIEE 10.1.3.4
Here are the details of what I have setup sofar:
Physical layer:
Dimension table DIM_ORG with columns:
-dimension_key
-org_total_code
-org_total_description
-org_detail_code
-org_detail_description
Dimension table DIM_DEPT with columns:
-dimension_key
-dept_total_code
-dept_total_description
-dept_detail_code
-dept_detail_description
Fact table FACT_SALES with columns:
-fk_org
-fk_dept
-sum_sales
Physical Joins:
FACT_SALES.fk_org = DIM_ORG_dimension_key
FACT_SALES.fl_dept = DIM_DEPT.dimension_key
Business Model & Mapping layer:
I created a logical dimension ORG_DEPT. It contains two logical table sources (DIM_ORG & DIM_DEPT) and the following logical columns:
- All Departments (mapped to dept_total_code)
- Organisation (mapped to org_detail_description)
- Organisation Number (mapped to org_detail_code)
- Department (mapped to dept_detail_description)
- Department Code (mapped to dept_detail_code)
The business logical key is based on the combination of Organisation Number & Department Code
The hierarchy I need is: All Departments -> Organisation -> Department so I created the following hierarchy for ORG_DEPT:
- Total Level containing: All Departments
- Organisation Level containing: Organisation Number (defined as the Logical level key) & Organisation (defined als the Drill level key)
- Detail Department Level containing: Department Code (defined as Logical level key) and Department (defined as Drill level key).
In the LTS of the dimension ORG_DEPT I've set the Content levels for the sources:
DIM_ORG : Organisation Level
DIM_DEPT: Detail Department Level
In the LTS no -inner- joins have been added against related physical tables.
I created a logical fact table SALES (based on the physical fact table) and joined it against the logical dimension table ORG_DEPT.
In the LTS the Content level for ORG_DEPT is set against the Detail Department Level. No - inner- joins have been aded against related physical tables.
When I create a report in Answers to test the hierachy and select only 'All Departments' I get the correct dimension value returned. When I try to drill to the next level I get the following ODBC error:
"Cannot find logical table source coverage for logical columns: [All Departments]. Please check more detailed level keys are mapped correctly".
When I create a report in Answers and select both 'All Departments' and 'Sales' I get the correct result. When I try to drill to the next level I get a different ODBC error:
"Missing join between logical tables DIM_DEPT and DIM_DEPT: There must be at least one physical join link between the underlying physical tables".
Any suggestions are welcome!
Thanks!

Hello Robert,
Your suggestions were known to me but I still wanted to combine the two physical dimension tables in one logical dimension. So I've played around a bit more and found the solution: In my original setup I had two seperate logical table sources (one for each physical dimension table). The solution was to combine the two logical table sources in one logical table source. I achieved that by logical joining the DIM_DEPT table to the FACT_SALES table and subsequently to the DIM_ORG within the 1 LTS and using inner joins.
Then I created the logical table key (a combination of org_detail_code & dept_detail_code). After that I could create the hierarchy with no problem.
Edited by: The_Dutchman on Nov 4, 2011 9:43 PM

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