How To Fix SDME_MDB321 - Field &1-&2 is already in the screen

SAP Error Message - Details

• Message type: E = Error

• Message class: SDME_MDB - DME: Maintenance Dialog Builder

• Message number: 321

• Message text: Field &1-&2 is already in the screen

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 SDME_MDB321 - Field &1-&2 is already in the screen ?

  The SAP error message SDME_MDB321 with the description "Field &1-&2 is already in the screen" typically occurs in the context of SAP's Sales and Distribution (SD) module, particularly when dealing with screen fields in a transaction. This error indicates that there is an attempt to display or manipulate a field that is already present on the screen, which can lead to conflicts or redundancy.
  Cause:
  
  Duplicate Field Assignment: The error often arises when a field is being assigned or displayed multiple times in the same screen context, which can happen due to customizations or modifications in the screen layout.
  Screen Configuration Issues: If there are issues in the screen configuration or if the screen is being called multiple times without proper handling, this error can occur.
  Program Logic Errors: There may be logic in the ABAP code that attempts to process the same field more than once, leading to this conflict.
  
  Solution:
  
  Check Screen Configuration: Review the screen layout and configuration in the transaction. Ensure that the field is not being defined or called multiple times.
  Review Custom Code: If there are any custom enhancements or modifications in the ABAP code, check for any logic that might be causing the field to be processed multiple times. Look for duplicate field definitions or assignments.
  Debugging: Use the SAP debugger to trace the execution of the program and identify where the field is being processed multiple times. This can help pinpoint the exact location in the code causing the issue.
  Consult Documentation: If the error persists, consult SAP documentation or support notes related to the specific transaction or screen to see if there are known issues or patches available.
  SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance, especially if this is a production issue.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may be working with various transaction codes in the SD module, such as VA01 (Create Sales Order), VA02 (Change Sales Order), etc.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message or provide guidance on similar issues.
  User Exits and BAdIs: If you have implemented user exits or Business Add-Ins (BAdIs) that interact with the screen, review them for potential conflicts.
  
  By following these steps, you should be able to identify and resolve the cause of the SDME_MDB321 error in your SAP environment.