How To Fix WB2_ASGT138 - Predecessor: the assignments are changed by &1 &3; allowed are &2 &3

SAP Error Message - Details

• Message type: E = Error

• Message class: WB2_ASGT - Shadow items ans assignments

• Message number: 138

• Message text: Predecessor: the assignments are changed by &1 &3; allowed are &2 &3

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WB2_ASGT138 - Predecessor: the assignments are changed by &1 &3; allowed are &2 &3 ?

  The SAP error message WB2_ASGT138 typically occurs in the context of assignment management within the SAP system, particularly when dealing with predecessor and successor relationships in project management or similar modules. This error indicates that there is a conflict with the assignment of predecessors, where the system is expecting certain types of assignments but has encountered others.
  Cause:
  The error message "Predecessor: the assignments are changed by &1 &3; allowed are &2 &3" suggests that:
  
  The predecessor assignments have been modified by a certain user or process (indicated by &1).
  The system is expecting a specific type of assignment (indicated by &2) but has encountered a different type (indicated by &3).
  This could be due to changes made in the project structure, incorrect assignment of tasks, or conflicts in the project scheduling.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Assignments: Check the predecessor and successor assignments in the project or task that is causing the error. Ensure that they conform to the expected types of assignments.
  
  
  Check for Changes: Identify any recent changes made to the assignments by users or automated processes. This can help you understand what might have caused the conflict.
  
  
  Correct the Assignments: If you find that the assignments do not match the expected types, correct them to align with the allowed assignments. This may involve reassigning tasks or adjusting the project structure.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific details on the allowed assignment types for your version of SAP. This can provide clarity on what is permissible.
  
  
  Test Changes: After making adjustments, test the changes in a development or test environment before applying them to the production system to ensure that the error is resolved.
  
  
  Seek Help from SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. They can provide more detailed insights based on your specific configuration and usage.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help you navigate assignment management, such as CJ20N for project management or CATS for time recording.
  User Roles: Ensure that users making changes have the appropriate roles and permissions to modify assignments.
  Change Logs: Review change logs or audit trails if available, to track who made changes and when, which can help in diagnosing the issue.
  
  By following these steps, you should be able to identify and resolve the cause of the WB2_ASGT138 error in your SAP system.