How To Fix IS019 - The partner function entered is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: IS - Equipment management

• Message number: 019

• Message text: The partner function entered is not unique

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

You establish the definitions of partner functions in Partner
Determination in Customizing.
<DS:TRAN.VOP2>Maintain Partner Determination</>

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IS019 - The partner function entered is not unique ?

  The SAP error message IS019, which states "The partner function entered is not unique," typically occurs in the context of partner determination in various SAP modules, such as Sales and Distribution (SD) or Materials Management (MM). This error indicates that the system has found multiple entries for the specified partner function, which leads to ambiguity in processing.
  Cause:
  
  
  Duplicate Partner Functions: The most common cause of this error is that there are multiple partner records defined for the same partner function in the system. For example, if you have multiple customers or vendors assigned to the same partner function (like Sold-to Party, Ship-to Party, etc.), the system cannot determine which one to use.
  
  
  Incorrect Configuration: The partner determination procedure may not be set up correctly, leading to conflicts in partner assignments.
  
  
  Data Entry Errors: Sometimes, the error can arise from incorrect data entry, where the user inadvertently selects or enters a partner function that has multiple valid entries.
  
  
  Solution:
  
  
  Check Partner Functions: Review the partner functions assigned to the relevant business object (e.g., sales order, purchase order). Ensure that each partner function is assigned uniquely to a single partner.
  
  
  Review Partner Determination Procedure: Go to the configuration settings for partner determination (Transaction code: SPRO) and check the partner determination procedure for the relevant document type. Ensure that the settings are correct and that there are no overlaps or duplicates.
  
  
  Data Cleanup: If duplicates are found, you may need to clean up the data by removing or consolidating duplicate partner records. This can involve deleting unnecessary entries or merging records as appropriate.
  
  
  Use Unique Identifiers: When entering partner functions, ensure that you are using unique identifiers (like customer numbers or vendor numbers) to avoid ambiguity.
  
  
  Consult Documentation: If the issue persists, refer to SAP documentation or consult with your SAP support team for further troubleshooting steps specific to your configuration.
  
  
  Related Information:
  
  Transaction Codes: You may find it useful to use transaction codes like VD03 (Display Customer), XD03 (Display Customer (Centrally)), or MK03 (Display Vendor) to check the partner records.
  Partner Determination Configuration: The configuration for partner determination can be found under the following path in SPRO: 
  
  Sales and Distribution -> Basic Functions -> Partner Determination -> Define Partner Determination Procedure.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to partner determination and error IS019.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.