How To Fix WS_TOOL161 - Type is still used in output parametr &1

SAP Error Message - Details

• Message type: E = Error

• Message class: WS_TOOL - Message Class for Web Services and Virtual Endpoints

• Message number: 161

• Message text: Type is still used in output parametr &1

Self-Explanatory Message

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• What is the cause and solution for SAP error message WS_TOOL161 - Type is still used in output parametr &1 ?

  The SAP error message:
  WS_TOOL161 Type is still used in output parameter &1
  typically occurs during development or modification of function modules, web services, or other ABAP objects where a data type is being changed or deleted but is still referenced in the output parameters of an interface or function module.
  
  Cause
  
  The data type you are trying to modify or delete is still being used as the type of an output parameter in a function module, web service, or another interface.
  SAP prevents changes or deletion of data types that are still in use to avoid inconsistencies or runtime errors.
  This message is a safeguard indicating that the type is still referenced and cannot be changed or removed until all references are cleared.
  
  
  Solution
  
  
  Identify where the type is used:
  
  Check the function module or interface mentioned in the message.
  Look at the output parameters of the function module or web service interface.
  Use transaction SE37 (Function Builder) or SE80 to inspect the function module parameters.
  Alternatively, use the Where-Used List (SE11 for data types) to find all references to the type.
  
  
  
  Remove or change the reference:
  
  If possible, change the output parameter to use a different data type.
  If the output parameter is no longer needed, remove it.
  If the type is used in multiple places, all references must be updated or removed.
  
  
  
  After clearing all references:
  
  You can then proceed to modify or delete the data type.
  Activate the changes.
  
  
  
  If the type is used in generated proxies or web services:
  
  Regenerate the proxy or web service after changing the data type.
  Make sure all dependent objects are adjusted accordingly.
  
  
  
  
  Related Information
  
  Transaction SE11: Data Dictionary — to check the data type and its references.
  Transaction SE37: Function Builder — to check function module parameters.
  Where-Used List: Use the "Where-Used" function in SE11 to find all references to the data type.
  Proxy/Web Service Development: If the type is used in web service interfaces or proxies, changes must be coordinated with the service definitions.
  SAP Notes: Sometimes SAP Notes provide specific guidance for certain types or scenarios.
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Error Message
  WS_TOOL161 Type is still used in output parameter &1
  
  
  Cause
  Data type is still referenced in output parameters of a function module or interface.
  
  
  Solution
  Remove or change all references to the data type in output parameters before modifying it.
  
  
  Tools
  SE11, SE37, SE80, Where-Used List
  
  
  
  
  If you provide the exact context (e.g., function module name, data type name), I can help you with more specific steps.