SAP Knowledge Base Article - Public

1560100 - BI4.0 Advanced Analysis Web problem: The MDAS Service encountered an error


When working with Advanced Analysis Web, users are shown the warning: << The MDAS Service encountered an error >>



  • BI 4.0 + any Patch
  • Advanced Analysis Web (edition for OLAP)
  • SAP BW 7.x
  • BEx Query Designer
  • BICS driver
  • OLAP Connection in CMC

Reproducing the Issue

  1. The underlying BEX Query contains a 'Key Figures Structure' where the Measures are organised into a stacked hierarchical order:


  1. The user then uses the contextual menu to navigate the data:


  1. Once the error appears - work cannot continue on the workspace..

This error can also happen when doing:

  • "Drill -> Expand" on Hierarchy levels
  • "Filter -> By Member" on Measures/Key Figures in Columns
  • "Filter -> By member" on Hierachical dimension in Rows
  • Working with a BEx Selection Structure (Characteristic or Key Figure)
  • Moving between "Select Everything" checkbox, and selecting individual values in the Filter Member Selector.


  • Product defect in the BI4.0 Ramp-Up build
  • Submitted to Development via Technical Escalation # 5000315074


  • Product Defect reference ADAPT01524493.
  • Resolved in Patch0.10 and SP01 


In the active workspace session (after encountering the error) Remove the offending object from the Layout (i.e. drag-drop item out of rows or columns), and then add the same element back to the crosstab or chart area.

See Also

  • Failed to complete XTab Row generateRepresentation operation. A data access exception has occurred
  • 'getRepresentation(ViewSpec)'
  • 'generateRepresentation'
  • MdasRuntimeException in XTabColumnAxisViewSpecProcessor


KBA , BI-RA-AWB , Analysis, edition for OLAP (Web) , Bug Filed


Crystal Reports 2008 V1