How To Fix UCUM055 - Task hierarchy contains an ambiguous identifier (&1)

SAP Error Message - Details

• Message type: E = Error

• Message class: UCUM - Messages for Monitor

• Message number: 055

• Message text: Task hierarchy contains an ambiguous identifier (&1)

What causes this issue?

The name "&V1&" for a task (or task group) is used in your system more
than once in the task hierarchy. This is invalid.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

In the workbench, check the definition of the task hierarchy and change
it. Remove duplicate names of tasks or task groups from the hierarchy.
Each task or task group may be used only once in the task hierarchy.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UCUM055 - Task hierarchy contains an ambiguous identifier (&1) ?

  The SAP error message UCUM055, which states "Task hierarchy contains an ambiguous identifier (&1)," typically occurs in the context of SAP's Unified Change and Transport System (UCT) or when dealing with task hierarchies in project management or transport management.
  Cause:
  The error indicates that there is an ambiguity in the task hierarchy, specifically that the identifier (represented by &1) is not unique. This can happen due to several reasons:
  
  Duplicate Identifiers: There may be multiple tasks or elements in the hierarchy that share the same identifier.
  Incorrect Configuration: The configuration of the task hierarchy may not be set up correctly, leading to conflicts.
  Transport Requests: If you are working with transport requests, there may be overlapping or conflicting requests that reference the same task.
  
  Solution:
  To resolve the UCUM055 error, you can take the following steps:
  
  
  Identify the Ambiguous Identifier: Check the specific identifier mentioned in the error message. This will help you locate the source of the ambiguity.
  
  
  Review Task Hierarchy: Go through the task hierarchy in the relevant project or transport request. Look for duplicate entries or tasks that may have the same identifier.
  
  
  Rename or Remove Duplicates: If you find duplicate identifiers, consider renaming them or removing unnecessary duplicates to ensure that each identifier is unique.
  
  
  Check Transport Requests: If the issue is related to transport requests, ensure that there are no overlapping requests that could be causing the ambiguity. You may need to adjust the requests or their dependencies.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for guidance on managing task hierarchies and transport requests.
  
  
  Contact SAP Support: If the issue persists and you cannot resolve it, consider reaching out to SAP support for further assistance.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Transaction Codes: Familiarize yourself with transaction codes related to transport management (e.g., SE09, SE10) and project management to navigate the task hierarchy effectively.
  Best Practices: Implement best practices for managing task hierarchies and transport requests to avoid similar issues in the future.
  
  By following these steps, you should be able to identify and resolve the ambiguity causing the UCUM055 error in your SAP system.