How To Fix R8306 - No hierarchy extraction function & exists in source system

SAP Error Message - Details

• Message type: E = Error

• Message class: R8 - Messages from the meta data generation

• Message number: 306

• Message text: No hierarchy extraction function & exists in source system

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message R8306 - No hierarchy extraction function & exists in source system ?

  The SAP error message R8306 "No hierarchy extraction function & exists in source system" typically occurs in the context of data extraction from a source system, particularly when working with SAP BW (Business Warehouse) or SAP HANA. This error indicates that the system is unable to find a hierarchy extraction function for the specified object in the source system.
  Cause:
  
  
  Missing Hierarchy Extraction Function: The primary cause of this error is that the hierarchy extraction function for the specified InfoObject does not exist in the source system. This can happen if the hierarchy has not been defined or activated in the source system.
  
  
  Incorrect Configuration: There may be an issue with the configuration of the DataSource in the source system, where the hierarchy extraction settings are not properly set up.
  
  
  Transport Issues: If the hierarchy was recently transported from another system, it may not have been properly activated or may be missing in the target system.
  
  
  Authorization Issues: Sometimes, the user executing the extraction may not have the necessary authorizations to access the hierarchy data.
  
  
  Solution:
  
  
  Check Hierarchy Definition: Verify that the hierarchy for the InfoObject is defined and activated in the source system. You can do this by navigating to the relevant InfoObject in the source system and checking its hierarchy settings.
  
  
  Review DataSource Configuration: Ensure that the DataSource is correctly configured to include hierarchy extraction. This can be done in the DataSource settings in the source system.
  
  
  Activate Hierarchy: If the hierarchy exists but is not activated, activate it in the source system. This can usually be done in the hierarchy maintenance transaction (e.g., RSH1 for InfoObjects).
  
  
  Check Transport Logs: If the hierarchy was recently transported, check the transport logs to ensure that the transport was successful and that all necessary objects were included.
  
  
  User Authorizations: Ensure that the user executing the extraction has the necessary authorizations to access the hierarchy data. This may involve checking roles and authorizations in the source system.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific version of SAP you are using, as there may be specific instructions or known issues related to hierarchy extraction.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench), RSH1 (Hierarchy Maintenance), and others that may help in managing DataSources and InfoObjects.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the R8306 error and implement the necessary solutions to resolve it.