How To Fix MC204 - Table & already exists. Choose another name

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 204

• Message text: Table & already exists. Choose another name

What causes this issue?

A table with this name is already defined in the ABAP/4 Dictionary.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Choose another name for your object.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC204 - Table & already exists. Choose another name ?

  The SAP error message MC204 ("Table & already exists. Choose another name") typically occurs when you are trying to create a new table in the SAP system, but a table with the same name already exists in the database. This can happen in various contexts, such as when creating database tables in the Data Dictionary (SE11) or when working with custom development.
  Cause:
  
  Duplicate Table Name: The most common cause is that the table name you are trying to use is already taken by another table in the database.
  Namespace Conflicts: If you are working in a development environment, there may be naming conventions or reserved namespaces that are already in use.
  Transport Issues: If you are importing transport requests, there may be conflicts with existing objects in the target system.
  
  Solution:
  
  Choose a Different Name: The simplest solution is to select a different name for your new table that does not conflict with existing tables.
  Check Existing Tables: Use transaction SE11 (Data Dictionary) to search for the existing table by name. This will help you confirm that the table already exists and may provide insight into its structure and purpose.
  Namespace Considerations: If you are developing custom objects, ensure that you are using the correct namespace (e.g., Z or Y) to avoid conflicts with standard SAP objects.
  Delete or Rename Existing Table: If the existing table is not needed, you may consider deleting it or renaming it. However, this should be done with caution, as it may affect other parts of the system.
  Transport Management: If the issue arises during a transport, ensure that the transport request does not contain conflicting objects. You may need to adjust the transport or resolve conflicts before proceeding.
  
  Related Information:
  
  
  Transaction Codes: 
  
  SE11: Data Dictionary
  SE80: Object Navigator
  SE37: Function Builder (if the table is related to function modules)
  
  
  
  Naming Conventions: Familiarize yourself with SAP's naming conventions for custom objects to avoid conflicts in the future.
  
  
  Documentation: Refer to SAP Help documentation for more details on creating database tables and managing the Data Dictionary.
  
  
  Development Guidelines: Follow best practices for development in SAP, including proper naming conventions, documentation, and version control.
  
  
  By following these steps, you should be able to resolve the MC204 error and successfully create your table in the SAP system.