How To Fix SGSUB004 - &1 is already defined as data type in &2 &3

SAP Error Message - Details

• Message type: E = Error

• Message class: SGSUB - Central Storage for Data Types and BAdIs

• Message number: 004

• Message text: &1 is already defined as data type in &2 &3

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SGSUB004 - &1 is already defined as data type in &2 &3 ?

  The SAP error message SGSUB004 indicates that there is a conflict in the definition of a data type. Specifically, it means that a data type with the name specified in the error message is already defined in the context of the specified program or structure. This typically occurs when you are trying to define a data type that has already been defined elsewhere in the same namespace or context.
  Cause:
  
  Duplicate Definition: The most common cause is that the data type you are trying to create or redefine already exists in the system.
  Namespace Conflicts: If you are working in a custom namespace, there might be a conflict with standard SAP data types or other custom types.
  Inconsistent Naming: Sometimes, similar names can lead to confusion, especially if the naming conventions are not strictly followed.
  
  Solution:
  
  
  Check Existing Definitions: 
  
  Use transaction SE11 (Data Dictionary) to search for the data type in question. Make sure that it is not already defined.
  If it is defined, consider using the existing data type instead of creating a new one.
  
  
  
  Rename the Data Type: 
  
  If you need to create a new data type, consider renaming it to avoid conflicts with existing definitions.
  
  
  
  Review Namespace: 
  
  Ensure that you are working within the correct namespace and that there are no conflicts with standard SAP types or other custom types.
  
  
  
  Check for Includes: 
  
  If your data type is part of an include or a structure, ensure that the include or structure does not already define the same data type.
  
  
  
  Consult Documentation: 
  
  Review any relevant documentation or naming conventions that your organization follows to avoid such conflicts in the future.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SE11: Data Dictionary
  SE80: Object Navigator
  SE37: Function Module
  SE24: Class Builder
  
  
  
  SAP Notes: 
  
  Check SAP Notes for any known issues or updates related to data type definitions.
  
  
  
  Best Practices: 
  
  Follow naming conventions and document your data types clearly to avoid future conflicts.
  Regularly review and clean up unused or obsolete data types in your development environment.
  
  
  
  By following these steps, you should be able to resolve the SGSUB004 error and prevent it from occurring in the future.