How To Fix SAP_ACO026 - Parameter &1 doesn't exists in ACO proxy

SAP Error Message - Details

• Message type: E = Error

• Message class: SAP_ACO - SAP ACO Messages

• Message number: 026

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

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAP_ACO026 - Parameter &1 doesn't exists in ACO proxy ?

  The SAP error message SAP_ACO026 indicates that a parameter specified in the ACO (Application Control Object) proxy does not exist. This error typically arises when there is a mismatch between the parameters expected by the ACO proxy and those that are actually defined or available in the system.
  Cause:
  
  Incorrect Parameter Name: The parameter name specified in the ACO proxy might be misspelled or incorrectly referenced.
  Missing Configuration: The parameter may not have been defined in the ACO configuration, leading to the system being unable to find it.
  Version Mismatch: If there are different versions of the ACO proxy or related components, the parameter might exist in one version but not in another.
  Transport Issues: If the ACO configuration was transported from one system to another, there might have been issues during the transport that led to missing parameters.
  
  Solution:
  
  Check Parameter Name: Verify that the parameter name specified in the ACO proxy is correct and matches the expected name in the configuration.
  Review ACO Configuration: Go to the ACO configuration settings and ensure that the parameter is defined correctly. You can do this by navigating to the relevant transaction codes (like ACO1, ACO2, etc.) to check the configuration.
  Update ACO Proxy: If the parameter is missing, you may need to add it to the ACO proxy configuration. Ensure that all necessary parameters are defined.
  Check for Transport Issues: If the configuration was recently transported, check the transport logs for any errors or warnings that might indicate issues with the transport.
  Consult Documentation: Refer to SAP documentation or notes related to the specific ACO proxy you are working with to ensure that you are following the correct setup procedures.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as ACO1 (Create ACO), ACO2 (Change ACO), and ACO3 (Display ACO) to manage ACO configurations.
  SAP Notes: Search for SAP Notes related to the specific ACO proxy you are using, as they may provide additional insights or solutions for common issues.
  System Logs: Check system logs (transaction SLG1) for any additional error messages or warnings that could provide more context about the issue.
  
  If the problem persists after following these steps, consider reaching out to your SAP support team or consulting with SAP support for further assistance.