How To Fix EA340 - Foreign key for structure '&1', field '&2' cannot be evaluated

EA340 - Overview

• Message type: E = Error

• Message class: EA - IDoc Basis Messages

• Message number: 340

• Message text: Foreign key for structure '&1', field '&2' cannot be evaluated

Self-Explanatory Message

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EA340 - Details

• The SAP error message EA340 indicates that there is an issue with a foreign key relationship in the data dictionary. Specifically, it means that the system is unable to evaluate a foreign key for a specified structure and field. This can occur for several reasons, and understanding the cause is essential for finding a solution.
  Causes of EA340 Error
  
  
  Missing Foreign Key Definition: The foreign key relationship may not be properly defined in the data dictionary for the specified structure and field.
  
  
  Inconsistent Data Types: The data types of the foreign key field and the referenced field may not match, leading to evaluation issues.
  
  
  Field Not Part of a Table: The field specified may not be part of a table that can be referenced by a foreign key.
  
  
  Transport Issues: If the data dictionary objects were transported from one system to another, there may be inconsistencies or missing objects in the target system.
  
  
  Authorization Issues: Sometimes,