How To Fix MC357 - No foreign key fields were found for field &-&

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 357

• Message text: No foreign key fields were found for field &-&

What causes this issue?

A foreign key relationship which is not (no longer) defined in the
ABAP/4 Dictionary was used in an aggregate definition of the lock object
for which the ENQUEUE and DEQUEUE function modules are to be generated.

System Response

Since the lock object is not consistent with the ABAP/4 Dictionary,
neither the ENQUEUE nor DEQUEUE function modules can be generated.

How to fix this error?

Adjust the definition of the lock object to the current definitions of
the ABAP/4 Dictionary or maintain the specified foreign key in the
ABAP/4 Dictionary.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC357 - No foreign key fields were found for field &-& ?

  The SAP error message MC357 "No foreign key fields were found for field &-&" typically occurs in the context of data extraction or reporting, particularly when working with InfoObjects in SAP BW (Business Warehouse) or when dealing with data models in SAP.
  Cause:
  This error generally indicates that the system is unable to find a foreign key relationship for a specific field in the data model. This can happen due to several reasons:
  
  Missing Foreign Key Definition: The field in question may not have a defined foreign key relationship in the underlying database or data model.
  Incorrect Field Mapping: The field may not be correctly mapped to the corresponding foreign key in the data source or InfoObject.
  Data Model Changes: Changes in the data model or InfoObjects that have not been properly updated or activated can lead to this error.
  Data Source Issues: The data source from which the data is being extracted may not have the necessary foreign key relationships defined.
  
  Solution:
  To resolve the MC357 error, you can take the following steps:
  
  
  Check Foreign Key Definitions:
  
  Go to the relevant InfoObject or data model in the SAP BW system.
  Verify that the foreign key relationships are correctly defined for the field in question.
  
  
  
  Review Field Mapping:
  
  Ensure that the field is correctly mapped to the corresponding foreign key in the data source.
  Check the transformation rules if you are using them to load data into the InfoObject.
  
  
  
  Activate Data Model:
  
  If there have been recent changes to the data model or InfoObjects, ensure that they are activated. Sometimes, changes need to be activated for the system to recognize them.
  
  
  
  Check Data Source:
  
  Review the data source from which you are extracting data. Ensure that it has the necessary foreign key relationships defined.
  If you are using a custom data source, ensure that it is correctly configured.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance on the InfoObject or data model you are working with.
  
  
  
  Debugging:
  
  If the issue persists, consider debugging the data extraction process to identify where the foreign key relationship is failing.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Transaction Codes: Use transaction codes like RSA1 (Data Warehousing Workbench) to manage InfoObjects and data models.
  Community Forums: SAP Community and other forums can be helpful for finding similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify and resolve the cause of the MC357 error in your SAP environment.