How To Fix EM326 - Call does not come from own system

SAP Error Message - Details

• Message type: E = Error

• Message class: EM - IS-U Migration

• Message number: 326

• Message text: Call does not come from own system

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 EM326 - Call does not come from own system ?

  The SAP error message EM326 ("Call does not come from own system") typically occurs in scenarios where a system is trying to execute a remote function call (RFC) or a similar operation, but the call is being rejected because it does not originate from an authorized or expected source. This is a security feature in SAP to prevent unauthorized access and ensure that only trusted systems can communicate with each other.
  Causes:
  
  Incorrect RFC Destination Configuration: The RFC destination may not be configured correctly, leading to the system not recognizing the source of the call.
  Network Issues: There may be network issues or misconfigurations that prevent the system from identifying the source correctly.
  Authorization Issues: The user or system making the call may not have the necessary authorizations to perform the operation.
  System Trust Configuration: The trust relationship between the systems may not be established correctly, leading to the rejection of calls from external systems.
  SAP Kernel Version: In some cases, the version of the SAP kernel may have bugs or issues that affect RFC calls.
  
  Solutions:
  
  Check RFC Destination: Verify the configuration of the RFC destination in transaction SM59. Ensure that the target system is correctly defined and that the connection parameters are accurate.
  Network Configuration: Ensure that there are no network issues preventing the systems from communicating. Check firewalls, routing, and any network security settings that may block the call.
  User Authorizations: Check the authorizations of the user or system making the call. Ensure that they have the necessary permissions to execute the function.
  Trust Relationship: If you are working with multiple SAP systems, ensure that the trust relationship is established correctly. This may involve configuring trusted RFC connections.
  SAP Notes: Check for any relevant SAP Notes that may address this issue. Sometimes, specific patches or updates may resolve underlying problems.
  System Logs: Review system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  Related Information:
  
  Transaction Codes: 
  
  SM59 - RFC Destinations
  SM21 - System Log
  SU01 - User Maintenance (to check user authorizations)
  
  
  SAP Documentation: Refer to SAP Help Portal for detailed documentation on RFC and security settings.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after checking these areas, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.