How To Fix RSWADMDERR1227 - Parent Node is not collective; only unique child nodes can exist.

SAP Error Message - Details

• Message type: E = Error

• Message class: RSWADMDERR1 - Web Application Designer 4.0 Error Messages

• Message number: 227

• Message text: Parent Node is not collective; only unique child nodes can exist.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSWADMDERR1227 - Parent Node is not collective; only unique child nodes can exist. ?

  The SAP error message RSWADMDERR1227 indicates that there is an issue with the structure of a hierarchy in the context of the SAP BW (Business Warehouse) or SAP BW/4HANA system. Specifically, the error states that the parent node in the hierarchy is not collective, which means that it cannot have multiple child nodes associated with it. Instead, only unique child nodes are allowed.
  Cause:
  
  Hierarchy Structure: The parent node is defined as a unique node rather than a collective node. In SAP BW, a collective node can have multiple child nodes, while a unique node can only have one child node.
  Data Model Configuration: The configuration of the data model may not align with the intended hierarchy structure, leading to this error when trying to process or load data.
  Incorrect Node Assignment: There may be an attempt to assign multiple child nodes to a parent node that is not set up to handle them.
  
  Solution:
  
  Check Hierarchy Definition: Review the hierarchy definition in the SAP BW system. Ensure that the parent node is defined as a collective node if you intend to have multiple child nodes.
  Adjust Node Types: If the parent node should indeed be a collective node, modify its properties in the hierarchy settings to allow for multiple children.
  Review Data Load Process: If this error occurs during a data load process, check the data being loaded to ensure that it adheres to the hierarchy structure defined in the system.
  Data Validation: Validate the data being processed to ensure that it does not contain duplicates or incorrect assignments that would violate the hierarchy rules.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on hierarchy management and node definitions.
  
  Related Information:
  
  SAP BW Hierarchies: Understanding how hierarchies work in SAP BW is crucial. Hierarchies can be defined in InfoObjects, and the type of node (collective vs. unique) determines how data can be structured.
  Transaction Codes: You may use transaction codes like RSA1 (Data Warehousing Workbench) to manage and view hierarchies.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context or fixes.
  Community Forums: Engaging with SAP community forums or support channels can provide insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the error and ensure that your hierarchy is correctly configured in SAP BW.