This issue has been classified as a working by design behavior in MicroStrategy. The impact is limited to MicroStrategy 10.4.x. A solution for this issue is available in current releases.
Symptom
Strategy 10.4.x, Derived Attribute does not display values.
Cause
Data Blend VLDB is disabled.
Action
Enable Data Blend VLDB property through Analytical Engine>Document Grids from Multiple Datasets as shown below: