How To Fix /EACC/DMB020 - Regeneration of a DataSource is only possible in expert mode

SAP Error Message - Details

• Message type: E = Error

• Message class: /EACC/DMB -

• Message number: 020

• Message text: Regeneration of a DataSource is only possible in expert mode

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 /EACC/DMB020 - Regeneration of a DataSource is only possible in expert mode ?

  The SAP error message /EACC/DMB020 Regeneration of a DataSource is only possible in expert mode typically occurs when you are trying to regenerate a DataSource in the SAP system, but the system is set to a mode that does not allow this action. This is often related to the DataSource being in a non-expert mode or when certain prerequisites are not met.
  Cause:
  
  Mode Restriction: The regeneration of the DataSource is restricted to expert mode, which means that the user interface is not currently set to allow this operation.
  User Permissions: The user may not have the necessary permissions to perform the regeneration of the DataSource.
  DataSource Configuration: The DataSource may not be configured correctly or may be in a state that does not allow regeneration.
  
  Solution:
  
  
  Switch to Expert Mode:
  
  Navigate to the DataSource in the SAP system.
  Look for an option to switch to expert mode. This is usually found in the settings or configuration options of the DataSource.
  Once in expert mode, attempt to regenerate the DataSource again.
  
  
  
  Check User Permissions:
  
  Ensure that your user account has the necessary authorizations to regenerate DataSources. You may need to contact your SAP administrator to verify and adjust your permissions.
  
  
  
  Review DataSource Configuration:
  
  Check the configuration of the DataSource to ensure that it is set up correctly. Look for any inconsistencies or issues that may prevent regeneration.
  If necessary, consult the documentation or seek assistance from a technical expert familiar with the specific DataSource.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message. There may be patches or updates that resolve known issues.
  
  
  
  Use Transaction Codes:
  
  If you are familiar with transaction codes, you can use transaction RSA1 to access the Data Warehousing Workbench and manage DataSources from there.
  
  
  
  Related Information:
  
  Expert Mode: In SAP, expert mode typically provides advanced options and settings that are not available in standard mode. It is often used by experienced users or administrators who need to perform complex configurations.
  DataSource: A DataSource in SAP is a structure that defines how data is extracted from a source system for use in SAP BW (Business Warehouse) or other applications.
  SAP Documentation: Always refer to the official SAP documentation for detailed instructions and best practices related to DataSource management and regeneration.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support or your internal SAP support team for further assistance.