How To Fix KPEP_WL401 - Error during hierarchy comparison

SAP Error Message - Details

• Message type: E = Error

• Message class: KPEP_WL - Messages For The Worklist in The Schedule Manager

• Message number: 401

• Message text: Error during hierarchy comparison

What causes this issue?

The hierarchy comparison could not be executed.

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 whether the hierarchy still exists.
Check whether the settings for the hierarchy comparison are correct.
These settings need to be modified manually for certain applications,
such as the Project System. To modify the settings, call up the context
menu for the "Hierarchy comparison" icon above the object list.

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 KPEP_WL401 - Error during hierarchy comparison ?

  The SAP error message KPEP_WL401, which indicates "Error during hierarchy comparison," typically occurs in the context of Profitability Analysis (CO-PA) when there are issues with the hierarchy structure being used for reporting or analysis. This error can arise due to various reasons, such as inconsistencies in the hierarchy data, missing nodes, or issues with the configuration of the hierarchy itself.
  Causes:
  
  Inconsistent Hierarchy Data: The hierarchy may have been modified, and the changes have not been properly reflected in the system.
  Missing Nodes: Some nodes in the hierarchy may be missing or incorrectly defined, leading to comparison issues.
  Configuration Issues: There may be configuration problems in the settings related to the hierarchy in the CO-PA module.
  Data Integrity Issues: There could be data integrity issues in the underlying tables that store hierarchy information.
  Version Mismatch: If there are multiple versions of the hierarchy, the system may be trying to compare incompatible versions.
  
  Solutions:
  
  Check Hierarchy Configuration: Review the configuration of the hierarchy in the SAP system. Ensure that all nodes are correctly defined and that there are no missing or orphaned nodes.
  Rebuild the Hierarchy: If the hierarchy has been modified, consider rebuilding it to ensure that all changes are correctly applied.
  Data Consistency Check: Run consistency checks on the hierarchy data to identify and rectify any inconsistencies.
  Review Authorization: Ensure that the user has the necessary authorizations to access and compare the hierarchy.
  Check for Updates: Ensure that your SAP system is up to date with the latest patches and updates, as this may resolve known issues related to hierarchy comparisons.
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error. SAP frequently releases notes that provide solutions or workarounds for known issues.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like KAH1 (Create Hierarchy) or KAH2 (Change Hierarchy) to manage hierarchies in CO-PA.
  SAP Documentation: Refer to the official SAP documentation for detailed information on managing hierarchies in CO-PA.
  Support Community: Engage with the SAP Community or forums where other users may have encountered similar issues and can provide insights or solutions.
  
  If the problem persists after trying the above solutions, it may be beneficial to contact SAP support for further assistance.