How To Fix OST_BSDM001 - Relationship &1 between &2 and &3 is missing; it has a 1:n cardinality

SAP Error Message - Details

• Message type: E = Error

• Message class: OST_BSDM - Web Service BOL Service Data Management

• Message number: 001

• Message text: Relationship &1 between &2 and &3 is missing; it has a 1:n cardinality

What causes this issue?

A relationship with a 1:n cardinality is missing. You are only allowed
to omit relationships with a 1:1 cardinality.

System Response

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

How to fix this error?

Insert the relationship &V1& into your design.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OST_BSDM001 - Relationship &1 between &2 and &3 is missing; it has a 1:n cardinality ?

  The SAP error message OST_BSDM001 indicates that there is a missing relationship between two business objects in the SAP system, specifically when the relationship is expected to have a 1:n (one-to-many) cardinality. This means that one instance of the first business object can be related to multiple instances of the second business object, but the system is unable to find the expected relationship.
  Cause:
  
  Missing Configuration: The relationship between the two business objects may not have been configured correctly in the system.
  Data Integrity Issues: There may be issues with the data integrity, such as missing entries in the database that should define the relationship.
  Custom Development: If there are custom developments or enhancements, they may not have been implemented correctly, leading to missing relationships.
  Transport Issues: If the system has recently undergone a transport of changes, the relationship might not have been included or properly activated.
  
  Solution:
  
  
  Check Configuration: 
  
  Go to the relevant configuration settings in the SAP system (usually in the customizing transaction SPRO) and verify that the relationship between the two business objects is defined correctly.
  Ensure that the cardinality is set to 1:n as expected.
  
  
  
  Data Validation:
  
  Check the database tables related to the business objects to ensure that the necessary entries exist.
  Use transaction codes like SE11 (Data Dictionary) to inspect the relevant tables and relationships.
  
  
  
  Review Custom Code:
  
  If there are custom developments, review the code to ensure that it correctly handles the relationships between the business objects.
  Check for any enhancements or user exits that might affect the relationship.
  
  
  
  Transport Management:
  
  If the issue arose after a transport, check the transport logs to ensure that all necessary objects were included and activated in the target system.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific business objects involved to see if there are any known issues or additional configuration steps required.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance, providing them with the error message and context.
  
  
  
  Related Information:
  
  Business Object Documentation: Familiarize yourself with the documentation for the specific business objects involved to understand their relationships better.
  Transaction Codes: Use relevant transaction codes such as SE11 (Data Dictionary), SE80 (Object Navigator), or SPRO (Customizing) to investigate the issue.
  SAP Notes: Search for SAP Notes related to the error message or the specific business objects to find any patches or updates that may resolve the issue.
  
  By following these steps, you should be able to identify and resolve the cause of the OST_BSDM001 error message in your SAP system.