How To Fix /AIF/MES091 - Proxy error &1: &2 &3 &4

SAP Error Message - Details

• Message type: E = Error

• Message class: /AIF/MES -

• Message number: 091

• Message text: Proxy error &1: &2 &3 &4

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 /AIF/MES091 - Proxy error &1: &2 &3 &4 ?

  The SAP error message /AIF/MES091 Proxy error &1: &2 &3 &4 typically indicates an issue with the Application Interface Framework (AIF) when processing messages or proxies. This error can arise due to various reasons, including configuration issues, network problems, or issues with the underlying service being called.
  Causes:
  
  Configuration Issues: Incorrect settings in the AIF configuration can lead to proxy errors. This includes incorrect endpoint URLs, authentication issues, or misconfigured message types.
  Network Problems: Connectivity issues between the SAP system and the external service or system can cause proxy errors.
  Service Availability: The external service that the proxy is trying to call may be down or not reachable.
  Data Issues: The data being sent in the message may not conform to the expected format or may contain invalid values.
  Authorization Issues: The user or service account may not have the necessary permissions to access the external service.
  
  Solutions:
  
  Check Configuration: Review the AIF configuration settings to ensure that all parameters are correctly set. This includes checking the endpoint URL, authentication methods, and message types.
  Network Connectivity: Verify that the SAP system can reach the external service. You can use tools like ping or telnet to check connectivity.
  Service Status: Ensure that the external service is up and running. You may need to contact the service provider or check the service logs.
  Data Validation: Validate the data being sent to ensure it meets the expected format and constraints. Check for any required fields or data types.
  Authorization Check: Ensure that the user or service account has the necessary permissions to access the external service. This may involve checking roles and authorizations in SAP.
  Error Logs: Check the AIF error logs for more detailed information about the error. This can provide insights into what went wrong during the processing of the message.
  
  Related Information:
  
  AIF Documentation: Refer to the official SAP documentation for the Application Interface Framework for detailed configuration and troubleshooting steps.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to the /AIF/MES091 error.
  Community Forums: Engage with the SAP Community or other forums where similar issues may have been discussed, and solutions shared.
  
  If the issue persists after trying the above solutions, it may be beneficial to involve your SAP Basis or AIF support team for further investigation.