How To Fix CME_DTYPE205 - &: predecessor<>successor assignment is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: CME_DTYPE - CME Data Type: Checks

• Message number: 205

• Message text: &: predecessor<>successor assignment is not unique

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CME_DTYPE205 - &: predecessor<>successor assignment is not unique ?

  The SAP error message CME_DTYPE205, which states that "predecessor<>successor assignment is not unique," typically occurs in the context of project management or scheduling within SAP, particularly when dealing with network activities in the Project System (PS) or Production Planning (PP) modules. This error indicates that there is an issue with the assignment of predecessor and successor relationships in a network or task sequence.
  Cause:
  The error is caused by the following scenarios:
  
  Duplicate Relationships: There are multiple assignments of the same predecessor to a successor, which creates ambiguity in the scheduling logic.
  Incorrect Configuration: The configuration of the project or network might not allow for the specific predecessor-successor relationship you are trying to establish.
  Data Integrity Issues: There may be inconsistencies or corruption in the data related to the project or network activities.
  
  Solution:
  To resolve the CME_DTYPE205 error, you can take the following steps:
  
  
  Check Predecessor-Successor Relationships:
  
  Go to the network or project activity where the error occurred.
  Review the predecessor and successor assignments to ensure that each predecessor is uniquely assigned to a successor.
  
  
  
  Remove Duplicates:
  
  If you find duplicate predecessor-successor assignments, remove the duplicates to ensure that each relationship is unique.
  
  
  
  Validate Network Configuration:
  
  Ensure that the network configuration allows for the relationships you are trying to create. Check the settings in the project management or production planning configuration.
  
  
  
  Use Transaction Codes:
  
  Use transaction codes like CN21 (Create Network) or CN22 (Change Network) to review and modify the network activities and their relationships.
  
  
  
  Check for Data Integrity:
  
  Run consistency checks on the project or network data to identify any integrity issues. You can use transaction codes like CNE1 (Check Network) to perform these checks.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidelines on managing predecessor and successor relationships in your version of SAP.
  
  
  
  Seek Help from SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes for managing networks and activities in SAP.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Forums: Engage with SAP user communities or forums for shared experiences and solutions from other users who may have encountered the same error.
  
  By following these steps, you should be able to identify and resolve the cause of the CME_DTYPE205 error in your SAP system.