How To Fix UCS0019 - Task hierarchy is inconsistent; tasks used more than once

SAP Error Message - Details

• Message type: E = Error

• Message class: UCS0 - Messages for Status Management

• Message number: 019

• Message text: Task hierarchy is inconsistent; tasks used more than once

What causes this issue?

Tasks or task groups are being used more than once in the current task
hierarchy.
This inconsistency needs to be cleaned up before continuing.

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?

Examine the current task hierarchy in the consolidation workbench, and
delete any multiple occurrences of tasks or task groups.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UCS0019 - Task hierarchy is inconsistent; tasks used more than once ?

  The SAP error message UCS0019 indicates that there is an inconsistency in the task hierarchy within the system. Specifically, it means that one or more tasks are being used more than once in the hierarchy, which is not allowed. This can occur in various contexts, such as when configuring workflows, task management, or project management within SAP.
  Cause:
  
  Duplicate Task Assignment: A task has been assigned to multiple parent tasks or is referenced in multiple places within the hierarchy.
  Incorrect Configuration: The task hierarchy may have been incorrectly configured, leading to overlapping or duplicate entries.
  Data Migration Issues: If data has been migrated from another system or from a previous version of SAP, it may have introduced inconsistencies.
  
  Solution:
  
  Review Task Hierarchy: Check the task hierarchy to identify where the duplicate tasks are being referenced. You can do this by navigating to the relevant configuration area in SAP where tasks are defined.
  Remove Duplicates: Once you identify the duplicate tasks, you will need to either remove the duplicate references or restructure the hierarchy to ensure that each task is only used once.
  Validate Configuration: After making changes, validate the configuration to ensure that the hierarchy is now consistent and that the error message no longer appears.
  Testing: Conduct thorough testing to ensure that the changes do not affect other areas of the system and that the task hierarchy functions as intended.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may need to use specific transaction codes to access task management or workflow configuration (e.g., SWDD for workflow definition).
  Documentation: Refer to SAP documentation or help resources for detailed guidance on configuring task hierarchies and understanding the implications of task relationships.
  Support: If the issue persists or if you are unsure about making changes, consider reaching out to SAP support or consulting with an SAP expert who can provide assistance based on your specific system configuration.
  
  By addressing the root cause of the inconsistency and ensuring that each task is uniquely assigned within the hierarchy, you should be able to resolve the UCS0019 error.