How To Fix AXT_MODEL201 - Field &1 cannot be transient and a logical key

SAP Error Message - Details

• Message type: E = Error

• Message class: AXT_MODEL -

• Message number: 201

• Message text: Field &1 cannot be transient and a logical key

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message AXT_MODEL201 - Field &1 cannot be transient and a logical key ?

  The SAP error message AXT_MODEL201 indicates that a field in a data model is being defined as both a transient field and a logical key, which is not allowed. In SAP, a transient field is one that does not have a persistent storage in the database, while a logical key is a field that uniquely identifies a record in a database table.
  Cause:
  The error occurs when:
  
  A field is defined as transient (meaning it is not stored in the database) but is also being used as a logical key (which requires it to be stored in the database).
  This conflict arises in the context of data modeling, particularly when working with Core Data Services (CDS) views or similar constructs in SAP.
  
  Solution:
  To resolve this error, you need to adjust the definition of the field in your data model. Here are the steps you can take:
  
  
  Review Field Definitions: Check the definition of the field in question. Determine whether it should be transient or if it should be a logical key.
  
  
  Modify Field Attributes:
  
  If the field is intended to be a logical key, remove the transient attribute from it.
  If the field is meant to be transient, then it should not be used as a logical key.
  
  
  
  Update Data Model: After making the necessary changes, update your data model accordingly. Ensure that the logical keys are correctly defined and that transient fields are used appropriately.
  
  
  Test Changes: After making the adjustments, test the data model to ensure that it functions as expected without triggering the error.
  
  
  Related Information:
  
  Transient Fields: These are typically used for calculations or temporary data that does not need to be stored in the database.
  Logical Keys: These are essential for uniquely identifying records in a database and are crucial for data integrity.
  CDS Views: If you are working with CDS views, ensure that the annotations and definitions align with the intended use of the fields.
  
  Additional Tips:
  
  Always refer to the SAP documentation for the specific version you are using, as there may be nuances in how transient fields and logical keys are handled.
  If you are unsure about the intended use of a field, consult with your data modeler or a colleague who has experience with the specific data model you are working on.
  
  By following these steps, you should be able to resolve the AXT_MODEL201 error and ensure that your data model is correctly configured.