How To Fix CMD_HIERARCHY018 - Deletion of hierarchy '&1' not possible while generation is running.

SAP Error Message - Details

• Message type: E = Error

• Message class: CMD_HIERARCHY - Messages for CMD_HIERARCHY Gateway service

• Message number: 018

• Message text: Deletion of hierarchy '&1' not possible while generation is running.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CMD_HIERARCHY018 - Deletion of hierarchy '&1' not possible while generation is running. ?

  The SAP error message CMD_HIERARCHY018 indicates that a deletion of a hierarchy is not possible because a generation process is currently running. This typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA, where hierarchies are used for organizing data in a structured manner.
  Cause:
  The error occurs when you attempt to delete a hierarchy while a generation process (such as data loading, updating, or processing) is still active. The system prevents the deletion to maintain data integrity and consistency, as the hierarchy may be in use during the generation process.
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Running Processes: 
  
  Use transaction codes like SM37 (Job Monitoring) to check for any running background jobs that might be generating or processing data related to the hierarchy you are trying to delete.
  
  
  
  Wait for Completion: 
  
  If you find that a job is running, you may need to wait for it to complete before attempting to delete the hierarchy again.
  
  
  
  Cancel the Job: 
  
  If the job is taking too long and you determine that it is safe to do so, you can cancel the job. Be cautious with this approach, as it may lead to incomplete data processing.
  
  
  
  Check for Locks: 
  
  Use transaction SM12 to check for any locks on the hierarchy. If there are locks, you may need to resolve them before proceeding with the deletion.
  
  
  
  Retry Deletion: 
  
  Once you have confirmed that no processes are running and there are no locks, attempt to delete the hierarchy again.
  
  
  
  Related Information:
  
  Hierarchy Management: Understand how hierarchies are structured and managed within your SAP system. This includes knowing the dependencies and relationships between different hierarchies and data objects.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench) for managing hierarchies and data models.
  Documentation: Refer to SAP Help documentation for more detailed information on hierarchy management and error handling in your specific version of SAP.
  
  By following these steps, you should be able to resolve the CMD_HIERARCHY018 error and successfully delete the hierarchy when it is safe to do so.