How To Fix SWDP_WDY_MD_ADT028 - ABAP interface already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: SWDP_WDY_MD_ADT - Web Dynpro Metadata ADT

• Message number: 028

• Message text: ABAP interface already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SWDP_WDY_MD_ADT028 - ABAP interface already exists ?

  The SAP error message SWDP_WDY_MD_ADT028 indicates that there is an attempt to create an ABAP interface that already exists in the system. This error typically occurs during the development of Web Dynpro applications or when working with the Web Dynpro ABAP framework.
  Cause:
  The error is caused by trying to create a new ABAP interface with a name that is already in use. This can happen if:
  
  You are attempting to create an interface with the same name as an existing one.
  There is a naming conflict due to a previous development or import of an object.
  The system is in a state where it has not properly recognized the existing interface due to caching or other issues.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Interfaces:
  
  Go to the ABAP Workbench (transaction SE80 or SE11) and check if the interface you are trying to create already exists.
  If it does exist, you may need to modify the existing interface instead of creating a new one.
  
  
  
  Rename the New Interface:
  
  If you need to create a new interface, consider using a different name that does not conflict with existing objects.
  
  
  
  Clear Cache:
  
  Sometimes, the system may have cached information that leads to this error. You can try clearing the cache:
  
  Use transaction code SE38 to run the report RSWBO050 to clear the Web Dynpro cache.
  Alternatively, you can use transaction SICF to refresh the service.
  
  
  
  
  
  Check Transport Requests:
  
  If you are working in a transport environment, ensure that there are no pending transport requests that might be causing conflicts.
  
  
  
  Check for Development Objects:
  
  If you are working in a development environment, ensure that there are no other developers creating interfaces with the same name simultaneously.
  
  
  
  Consult Documentation:
  
  Review the SAP documentation or notes related to Web Dynpro ABAP for any specific guidelines or known issues regarding interface creation.
  
  
  
  Related Information:
  
  Transaction Codes: SE80 (Object Navigator), SE11 (Data Dictionary), SE38 (ABAP Editor), SICF (HTTP Service Hierarchy).
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Web Dynpro ABAP Documentation: Familiarize yourself with the Web Dynpro ABAP framework and its object model to better understand how interfaces are used and managed.
  
  By following these steps, you should be able to resolve the error and continue with your development work in SAP.