How To Fix RS_B4HPREP020 - Delta for DataSource &1 (&2) must be reinitialized in &3

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_B4HPREP - B4H Transfer Preparation Messages

• Message number: 020

• Message text: Delta for DataSource &1 (&2) must be reinitialized in &3

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message RS_B4HPREP020 - Delta for DataSource &1 (&2) must be reinitialized in &3 ?

  The SAP error message RS_B4HPREP020 indicates that a delta for a specific DataSource must be reinitialized. This typically occurs in the context of SAP BW (Business Warehouse) when there are issues with the delta mechanism for data extraction from a source system.
  Cause:
  The error can be caused by several factors, including:
  
  DataSource Changes: If there have been changes to the DataSource structure or the underlying source system, the delta mechanism may become invalid.
  Delta Queue Issues: If the delta queue is inconsistent or has been reset, it may require reinitialization.
  Data Consistency Issues: If there are inconsistencies in the data that have been extracted, it may necessitate a reinitialization.
  Technical Issues: Problems with the extraction process, such as failed data loads or connectivity issues, can also trigger this error.
  
  Solution:
  To resolve the error, you typically need to reinitialize the delta for the affected DataSource. Here are the steps to do this:
  
  Check the DataSource: Verify if there have been any changes to the DataSource or the underlying data structure.
  Reinitialize Delta:
  
  Go to the SAP BW system.
  Navigate to the DataSource in question.
  Perform a full load to reinitialize the delta. This can usually be done through the Data Warehousing Workbench (transaction RSA1).
  Select the DataSource, and choose the option to "Manage" or "Load" data.
  Execute a full load to ensure that the delta mechanism is reset.
  
  
  Monitor Delta Queue: After reinitialization, monitor the delta queue to ensure that it is functioning correctly and that there are no further errors.
  Check for Errors: Review any logs or error messages that may provide additional context on why the delta needed reinitialization.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like RSA1 (Data Warehousing Workbench), RSMO (Monitor Data Transfer), and RSPC (Process Chain) to manage and monitor data loads.
  Documentation: Refer to SAP Help documentation for detailed steps on managing DataSources and delta loads.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to your DataSource or the error message.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP Basis or BW team for further investigation, as they may have access to additional tools and logs to diagnose the issue.