How To Fix MM_PUR_PO_EXT_MSG028 - SAP S/4HANA system is not active as a hub system.

SAP Error Message - Details

• Message type: E = Error

• Message class: MM_PUR_PO_EXT_MSG - Message class for Backend PO Extraction

• Message number: 028

• Message text: SAP S/4HANA system is not active as a hub 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 MM_PUR_PO_EXT_MSG028 - SAP S/4HANA system is not active as a hub system. ?

  The error message MM_PUR_PO_EXT_MSG028 in SAP S/4HANA indicates that the system is not configured as a hub system, which is necessary for certain functionalities related to purchase orders and external procurement processes. This error typically arises when trying to execute operations that require the system to act as a central hub for managing purchase orders, especially in scenarios involving integration with other systems or applications.
  Cause:
  
  System Configuration: The SAP S/4HANA system is not set up as a hub system. This could be due to missing configurations or settings that enable the system to function in this capacity.
  Integration Issues: The error may occur if there are attempts to connect or integrate with other systems (like SAP Ariba, SAP Fieldglass, etc.) that require the hub system to be active.
  Transport Layer Issues: If the transport layer is not correctly configured, it may lead to this error when trying to process purchase orders.
  
  Solution:
  
  
  Check System Configuration:
  
  Ensure that the SAP S/4HANA system is configured as a hub system. This involves checking the system settings in the SAP Fiori Launchpad or the relevant configuration transactions.
  You may need to consult the SAP documentation or your system administrator to verify the correct settings.
  
  
  
  Activate Hub System Features:
  
  If the system is intended to be a hub, you may need to activate specific features or components in the system. This can often be done through the SAP Fiori apps or the SAP GUI.
  Look for settings related to external procurement or integration with other SAP solutions.
  
  
  
  Review Integration Settings:
  
  If you are integrating with other systems, ensure that the integration settings are correctly configured. This includes checking RFC connections, middleware settings, and any relevant APIs.
  Ensure that the necessary authorizations and roles are assigned to users who are trying to perform the operations.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes that may address this specific error. SAP frequently releases updates and patches that may resolve known issues.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the configurations and settings, consider reaching out to SAP Support for further assistance. They can provide guidance based on the specific version and configuration of your system.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP Help Portal for detailed documentation on configuring SAP S/4HANA as a hub system.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can share their solutions.
  Training and Resources: Consider training sessions or resources that focus on SAP S/4HANA configuration and integration to better understand the requirements for setting up a hub system.
  
  By following these steps, you should be able to diagnose and resolve the MM_PUR_PO_EXT_MSG028 error in your SAP S/4HANA system.