How To Fix /PM0/3FB_MESSAGES064 - Multiple parent relationships are not allowed in this node type

/PM0/3FB_MESSAGES064 - Overview

• Message type: E = Error

• Message class: /PM0/3FB_MESSAGES -

• Message number: 064

• Message text: Multiple parent relationships are not allowed in this node type

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PM0/3FB_MESSAGES064 - Multiple parent relationships are not allowed in this node type ?

  The SAP error message /PM0/3FB_MESSAGES064 indicating "Multiple parent relationships are not allowed in this node type" typically arises in the context of SAP Project Management or similar modules where hierarchical structures (like Work Breakdown Structures or WBS) are used. This error suggests that there is an attempt to create a relationship where a node (like a task or project element) is being assigned to multiple parent nodes, which is not permitted in the system.
  
  Cause:
  
  Hierarchical Structure Violation: The node you are trying to create or modify is being linked to more than one parent node. In SAP, each node in a hierarchy can only have one direct parent.
  Data Entry Error: There may have been a mistake during data entry, where the same node is inadvertently being assigned to multiple parents.
  System Configuration: The configuration of the project structure may not allow for multiple parent relationships, which is standard in many project management