The compression dimension option is ignored if the outline is being built with Essbase versions earlier than 9.3. In versions less than 9.3, the Accounts dimension is tagged as the compression dimension internally.
The following dimensions cannot be specified as the compression dimension:
Multiple hierarchy dimensions
Attribute dimensions
A base dimension with an attribute association
If you tag a compression dimension with an Outline Hierarchy Information option other than “Dynamic at Dimension Level,” that dimension will be tagged as a dynamic dimension when it is loaded into Essbase.
The compressions dimension option applies to metaoutlines specified for aggregate storage only. To facilitate switching between aggregate and block data storage models, the option is always available, whether the metaoutline is specified for block storage or aggregate storage. If the metaoutline is specified for block storage, this option is ignored.