Does Data Exchange require a BSO cube to set up a Dimension target app for loading metadata?

Summary:

Having an issue with configuring Data Exchange target applications for metadata loads on an app that only has ASO cubes. Does this type of setup require a BSO cube, or can it work with just an ASO cube in place?

Content (required):

We have an application that is intended to only use ASO cube(s). One goal is to set up metadata integrations through Data Exchange using EPM Integration Agent.

The Target App definition for the ASO cube is in place, and shows up as Type = Essbase. When trying to set up the Application definitions for the metadata loads, and we select the app Type = Dimension, the app selection dialog is presented but there is nothing in the drop-down to select. We're expecting the Essbase app (ASO) to appear there.