How To Fix /BOFU/FDT_EXP_BO_RET121 - Node no. &1; just one node with PARENT_NODE_NR initial can exist

SAP Error Message - Details

• Message type: E = Error

• Message class: /BOFU/FDT_EXP_BO_RET -

• Message number: 121

• Message text: Node no. &1; just one node with PARENT_NODE_NR initial can exist

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /BOFU/FDT_EXP_BO_RET121 - Node no. &1; just one node with PARENT_NODE_NR initial can exist ?

  The SAP error message /BOFU/FDT_EXP_BO_RET121 Node no. &1; just one node with PARENT_NODE_NR initial can exist typically occurs in the context of SAP's Business Object Framework (BOF) or when working with the Flexible Data Model (FDT). This error indicates that there is an issue with the hierarchical structure of nodes in a business object, specifically that there can only be one root node (a node with no parent).
  Cause:
  
  Duplicate Root Nodes: The error is triggered when there are multiple nodes defined with a PARENT_NODE_NR (Parent Node Number) that is initial (i.e., empty or null). This means that there are multiple nodes that are trying to act as root nodes in the hierarchy, which is not allowed.
  Data Integrity Issues: There may be inconsistencies in the data model or configuration that lead to the creation of multiple root nodes.
  Configuration Errors: Incorrect configuration in the business object or data model setup can lead to this issue.
  
  Solution:
  
  Check Node Configuration: Review the configuration of the nodes in the business object. Ensure that only one node is set as the root node (i.e., has an initial PARENT_NODE_NR).
  Data Cleanup: If there are multiple nodes with an initial PARENT_NODE_NR, you will need to identify and remove or reconfigure the duplicate nodes to ensure that only one root node exists.
  Review Hierarchical Structure: Ensure that the hierarchical structure of the business object is correctly defined. Each node should have a valid parent node except for the root node.
  Use Transaction Codes: Utilize relevant transaction codes (like BOFU or FDT) to analyze and modify the business object definitions and their relationships.
  Consult Documentation: Refer to SAP documentation or notes related to the Flexible Data Model and Business Object Framework for specific guidelines on node configuration.
  
  Related Information:
  
  SAP Notes: Check for any SAP Notes that might address this specific error or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Testing: After making changes, test the business object to ensure that the error is resolved and that the hierarchical structure is functioning as expected.
  
  If the issue persists after following these steps, it may be beneficial to consult with an SAP expert or support for further assistance.