How To Fix MPE_OAN022 - Where-used list for operation activity network &1 is not empty

SAP Error Message - Details

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 022

• Message text: Where-used list for operation activity network &1 is not empty

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MPE_OAN022 - Where-used list for operation activity network &1 is not empty ?

  The SAP error message MPE_OAN022 indicates that there is a where-used list for an operation in an activity network that is not empty. This typically occurs when you are trying to delete or modify an operation in a network, but there are dependencies or references to that operation elsewhere in the system.
  Cause:
  
  Dependencies: The operation you are trying to delete or modify is being referenced by other objects, such as other networks, activities, or projects.
  Incomplete Deletion: The operation may have been partially deleted or modified, leading to inconsistencies in the data.
  Data Integrity: SAP enforces data integrity, and if there are references to the operation, it will not allow changes to ensure that the system remains consistent.
  
  Solution:
  
  
  Check Where-Used List: Use the where-used list functionality in SAP to identify where the operation is being referenced. This can help you understand the dependencies.
  
  You can access this by navigating to the operation in the network and using the where-used list feature.
  
  
  
  Remove Dependencies: If you find that there are dependencies, you will need to remove or modify those references before you can delete or change the operation.
  
  This may involve adjusting other operations, networks, or projects that reference the operation in question.
  
  
  
  Consult Documentation: Review the relevant SAP documentation or help files for more detailed instructions on handling operations in activity networks.
  
  
  Use Transaction Codes: You can use transaction codes like CN22 (Change Network) or CN41 (Display Network) to manage your networks and operations.
  
  
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with an SAP expert for assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes for managing networks and operations, such as CJ20N (Project Builder) and CN01 (Create Network).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Training: Consider training or resources on SAP Project System (PS) if you frequently work with networks and operations.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.