How To Fix RS2HANA_VIEW182 - &1: Hierarchy &2 not valid for SAP HANA. Multiple parents in NotAssigned.

SAP Error Message - Details

• Message type: E = Error

• Message class: RS2HANA_VIEW - HANA Views for BW Objects

• Message number: 182

• Message text: &1: Hierarchy &2 not valid for SAP HANA. Multiple parents in NotAssigned.

If the hierarchy contains non-basic characteristic nodes, the names of
these nodes are included in the master data values and the hierarchy has
the property 'do not suppress unassigned nodes', the unsupported case of
multiple parents will occur at runtime (if the hierarchy is displayed
and includes the unassigned nodes).
In order to prevent this from occurring, this type of hierarchy is not
allowed.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RS2HANA_VIEW182 - &1: Hierarchy &2 not valid for SAP HANA. Multiple parents in NotAssigned. ?

  The SAP error message RS2HANA_VIEW182 indicates that there is an issue with a hierarchy in SAP BW (Business Warehouse) that is being used in conjunction with SAP HANA. Specifically, the error message states that the hierarchy is not valid for SAP HANA due to the presence of multiple parents in the "NotAssigned" node.
  Cause:
  
  
  Hierarchy Structure: In SAP BW, hierarchies can have multiple parent nodes. However, in SAP HANA, the hierarchy structure must adhere to certain rules, including that each node can only have one parent. The error occurs when a node in the hierarchy has multiple parents, which is not allowed in HANA.
  
  
  Data Model Issues: The hierarchy might have been defined or modified in a way that violates the constraints required by HANA. This could happen during data modeling or when migrating from BW to HANA.
  
  
  Inconsistent Data: There may be inconsistencies in the data that lead to multiple parent assignments for a single node.
  
  
  Solution:
  
  
  Review Hierarchy Definition: Check the hierarchy definition in the BW system. Ensure that each node has a single parent. You may need to adjust the hierarchy structure to comply with HANA requirements.
  
  
  Data Cleansing: If the hierarchy is derived from data, ensure that the underlying data does not contain multiple parent assignments. You may need to clean the data to remove any inconsistencies.
  
  
  Recreate the Hierarchy: If the hierarchy is complex and difficult to fix, consider recreating it from scratch, ensuring that the new hierarchy adheres to the single-parent rule.
  
  
  Use Hierarchy Maintenance Tools: Utilize SAP tools for hierarchy maintenance to identify and correct issues. This may include transaction codes like RSH1 for hierarchy maintenance.
  
  
  Check for Updates: Ensure that your SAP BW and HANA systems are up to date with the latest patches and updates, as there may be fixes or enhancements related to hierarchy handling.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to hierarchy handling in HANA for specific guidelines and best practices.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or fixes related to this error message. SAP frequently publishes notes that address specific error messages and provide guidance on resolution.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  SAP BW on HANA: Familiarize yourself with the differences between BW and HANA in terms of data modeling and hierarchy management, as this will help prevent similar issues in the future.
  
  By addressing the hierarchy structure and ensuring compliance with HANA's requirements, you should be able to resolve the error message RS2HANA_VIEW182.