How To Fix CM_EAM_TL_API100 - No unique HTL found for (hierarchical) task list &1/&2/&3

SAP Error Message - Details

• Message type: E = Error

• Message class: CM_EAM_TL_API - Message class for eam task list API

• Message number: 100

• Message text: No unique HTL found for (hierarchical) task list &1/&2/&3

What causes this issue?

More than one hierarchy task list has the (hierarchy) task list &V1&/
&V2&/&V3& as child.

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?

Check the exporting parameter ET_PLKOD_SELECT and choose a hierarchy
task list to go with.

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 CM_EAM_TL_API100 - No unique HTL found for (hierarchical) task list &1/&2/&3 ?

  The SAP error message CM_EAM_TL_API100 indicates that the system could not find a unique hierarchical task list (HTL) for the specified task list type, group, and version. This error typically occurs in the context of maintenance planning and execution when the system is trying to retrieve or process a task list that is expected to be unique but is not.
  Cause:
  
  Non-Unique Task Lists: There may be multiple task lists with the same identifier (task list type, group, and version) in the system, leading to ambiguity.
  Incorrect Input: The parameters provided (task list type, group, and version) may be incorrect or not match any existing task lists.
  Data Inconsistency: There could be inconsistencies in the database or issues with the data model that prevent the system from identifying a unique task list.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to view or access the task lists.
  
  Solution:
  
  Check Task List Entries: Verify the task lists in the system using transaction codes like IA05 (Display Task List) or IA02 (Change Task List) to ensure that the task list you are trying to access exists and is unique.
  Correct Input Parameters: Ensure that the parameters you are using to call the task list are correct. Double-check the task list type, group, and version.
  Data Cleanup: If there are multiple task lists with the same identifier, consider consolidating them or ensuring that they are uniquely defined.
  Authorization Check: Ensure that the user has the necessary authorizations to access the task lists. You can check this with your SAP security team.
  Consult Documentation: Review SAP documentation or notes related to task lists and the specific error message for any additional guidance or updates.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes for managing task lists, such as IA01 (Create Task List), IA02, and IA05.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for the error message number in the SAP Support Portal.
  Debugging: If you have access to debugging tools, you can analyze the program logic to see where the error is being triggered and what data is being processed.
  
  If the issue persists after trying the above solutions, it may be beneficial to reach out to your SAP support team or consult with an SAP expert for further assistance.