How To Fix RIS_MESSAGES020 - Processing of different data model types not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: RIS_MESSAGES - Message Class of Repository Information System

• Message number: 020

• Message text: Processing of different data model types not possible

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RIS_MESSAGES020 - Processing of different data model types not possible ?

  The SAP error message RIS_MESSAGES020 ("Processing of different data model types not possible") typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when there is an attempt to process or combine data from different data model types that are incompatible with each other. This can happen in various scenarios, such as when trying to execute a query that involves multiple InfoProviders or when using different types of data sources that do not align.
  Causes:
  
  Incompatible Data Models: The error often arises when you are trying to combine data from different types of InfoProviders (e.g., combining data from a DataStore Object (DSO) with a MultiProvider or InfoCube).
  Query Design Issues: If a query is designed to pull data from multiple sources that are not compatible, this error can occur.
  Data Source Mismatch: Using different data sources that do not share a common structure or key fields can lead to this error.
  Incorrect Aggregation: Attempting to aggregate data from different models without proper alignment can also trigger this message.
  
  Solutions:
  
  Check Data Model Compatibility: Ensure that the data models you are trying to combine are compatible. Review the InfoProviders and their structures to confirm they can be used together.
  Modify the Query: If you are working with a query, consider redesigning it to ensure that it only pulls data from compatible sources. You may need to create a new InfoProvider that consolidates the data into a compatible format.
  Use a Composite Provider: If you need to combine data from different sources, consider using a Composite Provider, which allows for more flexible data modeling and can handle different data sources more effectively.
  Review Key Fields: Ensure that the key fields used in the different data models align correctly. Mismatched keys can lead to issues when trying to process data together.
  Consult Documentation: Refer to SAP documentation or community forums for specific guidance on the data models you are working with, as there may be known limitations or best practices.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Training and Documentation: Consider reviewing SAP training materials or documentation related to BW modeling and query design to better understand how to structure your data models effectively.
  
  If the issue persists after trying the above solutions, it may be beneficial to involve your SAP Basis or BW team for further investigation, as they may have access to additional tools and logs that can help diagnose the problem.