How To Fix /BOBF/TOOLS_CC030 - Assoc. has card. 1:1..n but sourcekey is more than once in ET_KEY_LINK

SAP Error Message - Details

• Message type: E = Error

• Message class: /BOBF/TOOLS_CC -

• Message number: 030

• Message text: Assoc. has card. 1:1..n but sourcekey is more than once in ET_KEY_LINK

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /BOBF/TOOLS_CC030 - Assoc. has card. 1:1..n but sourcekey is more than once in ET_KEY_LINK ?

  The SAP error message /BOBF/TOOLS_CC030 indicates an issue related to the Business Object Processing Framework (BOPF) in SAP. Specifically, this error occurs when there is a mismatch in the cardinality of associations defined in the BOPF model. The error message states that an association has a cardinality of 1:1..n, but the source key appears more than once in the ET_KEY_LINK table.
  Cause:
  
  
  Cardinality Mismatch: The association defined in the BOPF model specifies that for a single instance of the source object, there can be multiple instances of the target object (1:1..n). However, the data being processed indicates that there are multiple entries for the same source key, which violates the expected cardinality.
  
  
  Data Integrity Issues: There may be duplicate entries in the underlying database tables that are being accessed, leading to multiple records being returned for a single source key.
  
  
  Incorrect Configuration: The BOPF model may be incorrectly configured, leading to an inconsistency between the defined associations and the actual data.
  
  
  Solution:
  
  
  Check Data Consistency: Review the data in the relevant database tables to ensure that there are no duplicate entries for the source key. You can use SQL queries to identify duplicates.
  
  
  Review BOPF Model Configuration: Check the BOPF model configuration to ensure that the associations are correctly defined. Make sure that the cardinality specified matches the expected data structure.
  
  
  Adjust Data: If duplicates are found, you may need to clean up the data by removing or consolidating duplicate records to ensure that each source key corresponds to the expected number of target records.
  
  
  Debugging: If the issue persists, consider debugging the BOPF processing logic to identify where the data is being fetched and how the associations are being handled.
  
  
  Consult Documentation: Refer to SAP documentation or community forums for additional insights or similar issues encountered by other users.
  
  
  Related Information:
  
  BOPF Documentation: Familiarize yourself with the BOPF framework and its concepts, including associations, cardinality, and key links.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on best practices for BOPF configuration.
  Transaction Codes: Use transaction codes like SE80 (Object Navigator) or SE11 (Data Dictionary) to inspect the BOPF model and underlying database tables.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.