How To Fix M2020 - Field catalog already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: M2 - LIS: Generating and updating info structures

• Message number: 020

• Message text: Field catalog already exists

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 M2020 - Field catalog already exists ?

  The SAP error message M2020, which states "Field catalog already exists," typically occurs in the context of SAP's Material Management (MM) module, particularly when dealing with reports or ALV (ABAP List Viewer) grids. This error indicates that there is an attempt to create a field catalog that has already been defined in the program or report.
  
  Cause:
  The error is usually caused by one of the following reasons:
  
  Duplicate Field Catalog Definition: The field catalog is being defined multiple times in the same program or report.
  Improper Handling of Field Catalog: The field catalog is not being cleared or reset before being redefined, leading to conflicts.
  Program Logic Issues: The logic in the program may inadvertently lead to the same field catalog being created multiple times.
  
  
  Solution:
  To resolve the M2020 error, you can take the following steps:
  
  
  Check for Duplicate Definitions:
  
  Review the code to ensure that the field catalog is defined only once. Look for any duplicate