How To Fix SAP_ACO028 - Function &1 doesn't exists in ACO proxy

SAP Error Message - Details

• Message type: E = Error

• Message class: SAP_ACO - SAP ACO Messages

• Message number: 028

• Message text: Function &1 doesn't exists in ACO proxy

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAP_ACO028 - Function &1 doesn't exists in ACO proxy ?

  The SAP error message SAP_ACO028 indicates that a function specified in the ACO (Application Communication Object) proxy does not exist. This error typically arises in the context of SAP's Application Interface Framework (AIF) or when dealing with ACO proxies in general.
  Cause:
  
  Function Not Defined: The function you are trying to call does not exist in the ACO proxy definition. This could be due to a typo in the function name or the function not being implemented.
  Incorrect Configuration: The ACO proxy might not be correctly configured, leading to the system being unable to locate the specified function.
  Transport Issues: If the ACO proxy was recently transported from one system to another (e.g., from development to production), the function might not have been included in the transport.
  Version Mismatch: There may be a version mismatch between the ACO proxy and the function module or method it is trying to call.
  
  Solution:
  
  Check Function Name: Verify that the function name specified in the ACO proxy is correct. Look for any typos or discrepancies.
  Review ACO Proxy Configuration: Ensure that the ACO proxy is correctly configured and that the function is defined in the relevant context.
  Implement the Function: If the function does not exist, you may need to implement it. This could involve creating a new function module or method in the relevant class.
  Transport Check: If the ACO proxy was transported, check the transport logs to ensure that all necessary objects were included in the transport request.
  Debugging: Use transaction codes like SE37 (for function modules) or SE80 (for object navigator) to debug and check if the function exists in the system.
  Consult Documentation: Review the SAP documentation or notes related to ACO proxies and the specific function you are trying to use.
  
  Related Information:
  
  Transaction Codes: 
  
  SE37: Function Module Maintenance
  SE80: Object Navigator
  SICF: Maintain HTTP Services (for ACO services)
  
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Community Forums: SAP Community and other forums can be useful for finding similar issues and solutions shared by other users.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.