How To Fix ECH_MSG021 - Enter a persistency class for &1 &2

SAP Error Message - Details

• Message type: E = Error

• Message class: ECH_MSG - Messages for Error & Conflict Handler

• Message number: 021

• Message text: Enter a persistency class for &1 &2

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message ECH_MSG021 - Enter a persistency class for &1 &2 ?

  The SAP error message ECH_MSG021, which states "Enter a persistency class for &1 &2," typically occurs in the context of the SAP Environment for the management of data persistence, particularly when working with the Enterprise Cache (ECH) or similar data management frameworks.
  Cause:
  This error message indicates that a required persistency class has not been defined for a specific object or entity in the system. The persistency class is essential for determining how data is stored and managed within the SAP system. The placeholders &1 and &2 usually represent the specific object type and its identifier (like a table name or structure).
  Solution:
  To resolve this error, you need to define a persistency class for the specified object. Here are the steps you can take:
  
  
  Identify the Object: Check the error message for the specific object type and identifier (the values of &1 and &2).
  
  
  Access the Configuration: Go to the relevant configuration area in the SAP system where persistency classes are defined. This is typically done in the transaction codes related to the specific module you are working with.
  
  
  Define Persistency Class:
  
  Navigate to the section where you can define or assign persistency classes.
  Create a new persistency class if one does not exist, or assign an existing one to the object in question.
  
  
  
  Check Dependencies: Ensure that any dependencies or prerequisites for the persistency class are met. This may include checking related configurations or settings.
  
  
  Test the Changes: After making the necessary changes, test the functionality to ensure that the error no longer occurs.
  
  
  Consult Documentation: If you are unsure about the correct persistency class to use, refer to the SAP documentation or consult with a colleague who has experience with the specific module or functionality.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to this error message.
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help in managing persistency classes, such as SE11 (Data Dictionary) or SE80 (Object Navigator).
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered and resolved similar issues.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance.