How To Fix DPR_BAPI146 - A relationship with &1 as predecessor and &2 as successor already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: DPR_BAPI - Messages for BAPIs in Project Management

• Message number: 146

• Message text: A relationship with &1 as predecessor and &2 as successor already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DPR_BAPI146 - A relationship with &1 as predecessor and &2 as successor already exists ?

  The SAP error message DPR_BAPI146 indicates that there is an attempt to create a relationship between two elements (typically tasks or activities) in a project, but a relationship with the same predecessor and successor already exists. This error is common in project management scenarios within SAP, particularly when using the Project System (PS) or the Dynamic Project Management (DPM) module.
  Cause:
  The error occurs when:
  
  You are trying to create a new relationship between two tasks (or activities) that already have an existing relationship defined in the system.
  The predecessor and successor tasks are already linked, and the system does not allow duplicate relationships.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Relationships:
  
  Navigate to the project or task in question and check the existing relationships between the predecessor and successor tasks.
  You can do this by using transaction codes like CJ20N (Project Builder) or CJ02 (Change Project) to view the project structure and relationships.
  
  
  
  Modify Existing Relationship:
  
  If the existing relationship needs to be changed (e.g., changing the type of relationship), you can modify it instead of trying to create a new one.
  
  
  
  Delete Duplicate Relationship:
  
  If you find that there are indeed duplicate relationships that are not needed, you can delete the unnecessary one.
  
  
  
  Review Input Data:
  
  Ensure that the data you are inputting when trying to create the relationship is correct and does not inadvertently reference an existing relationship.
  
  
  
  Consult Documentation:
  
  If you are unsure about the relationships and their types, refer to SAP documentation or help resources for guidance on how to manage task relationships.
  
  
  
  Related Information:
  
  Relationship Types: Familiarize yourself with the different types of relationships (Finish-to-Start, Start-to-Start, Finish-to-Finish, Start-to-Finish) and their implications in project scheduling.
  Transaction Codes: Common transaction codes for managing projects in SAP include:
  
  CJ20N - Project Builder
  CJ02 - Change Project
  CJ03 - Display Project
  
  
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message, as there may be patches or updates that address specific scenarios.
  
  By following these steps, you should be able to resolve the error and manage your project relationships effectively.