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

/BOFU/FDT_EXP_BO_RET121 - Overview

• 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

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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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