Multiple hierarchy in mondrian says Hierarchy not found - schema

Question

I have following Dimension in mondrian schema. Mondrian on creating connection says
mondrian.olap.MondrianException: Mondrian Error:Internal error: Hierarchy '[Product]' not found
<Dimension name="Product" foreignKey="item_id">
<Hierarchy hasAll="true" primaryKey="item_code" primaryKeyTable="m_item_master">
<Join leftKey="item_code" rightKey="item_code">
<Table name="m_item_master"/> <!--dummy_master--> <!--m_item_master-->
<Table name="m_item_relation"/>
</Join>
<Level name="Department" table="m_item_relation" column="department"/>
<Level name="Class" table="m_item_relation" column="category"/>
<Level name="Item" table="m_item_master" column="item_code" ordinalColumn="item_code" nameColumn="name" uniqueMembers="true" type="Numeric"/>
</Hierarchy>
<Hierarchy name="Base Item" hasAll="false" primaryKey="item_code" primaryKeyTable="m_item_master">
<Join leftKey="item_code" rightKey="item_code">
<Table name="m_item_master"/> <!--dummy_master--> <!--m_item_master-->
<Table name="m_item_relation"/>
</Join>
<Level name="Department" table="m_item_relation" column="department" captionColumn="department"/>
<Level name="Item" table="m_item_master" column="item_code" ordinalColumn="item_code" nameColumn="name" uniqueMembers="true" captionColumn="name" type="Numeric"/>
<Property name="Price" table="m_item_master" column="price" />
</Hierarchy>
</Dimension>
I am using Mondrian-4.0.0-SNAPSHOT version and tried the same with latest mondrian 4.2.0.0-204 version as well.
Note:
Moreover I am getting this Error during mondrian connection creation itself. So it doesn't concern with any MDX query passed to it.

Answer 1

Ok. This is the what the mistake I found. For the clarification, Mondrian do support multiple hierarchy, but to the above schema we seems to have a different problem with the associated roles.
<Role name="myrole">
<SchemaGrant access="none">
<CubeGrant cube="Transaction" access="all">
<HierarchyGrant hierarchy="[Product]" access="custom" rollupPolicy="partial">
<MemberGrant member="[Product].[Cottage Foods]" access="all"/>
<MemberGrant member="[Product].[Vegetables]" access="all"/>
....
</HierarchyGrant>
....
</CubeGrant>
</SchemaGrant>
</Role>
In the above role, though the default hierarchy takes the name of the dimension in mondrian, we have to specify them as [Dimension.Hierarchy] in roles but not just Hierarchy name if you have multiple hierarchy within the Dimension. In our case, it should be as below.
<Role name="myrole">
<SchemaGrant access="none">
<CubeGrant cube="Transaction" access="all">
<HierarchyGrant hierarchy="[Product.Product]" access="custom" rollupPolicy="partial">
<MemberGrant member="[Product.Product].[Cottage Foods]" access="all"/>
<MemberGrant member="[Product.Product].[Vegetables]" access="all"/>
....
</HierarchyGrant>
....
</CubeGrant>
</SchemaGrant>
</Role>
This solves the above problem.