How To Fix RSLPO_DFG057 - 'Only Get Delta Once' set to '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: RSLPO_DFG - Messages for Data-Flow Generation

• Message number: 057

• Message text: 'Only Get Delta Once' set to '&1'

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 RSLPO_DFG057 - 'Only Get Delta Once' set to '&1' ?

  The SAP error message RSLPO_DFG057 'Only Get Delta Once' typically occurs in the context of data extraction processes, particularly when working with SAP Data Warehousing or SAP BW (Business Warehouse). This error indicates that a delta extraction process is being attempted more than once for a specific data source or request, which is not allowed.
  Cause:
  
  Delta Extraction Limitation: The error arises because the delta extraction for a particular data source can only be executed once for a specific time period or data set. If a delta extraction has already been performed, attempting to perform it again without resetting the delta pointer will trigger this error.
  Incorrect Delta Management: If the delta management settings are not configured correctly, or if there are issues with the delta queue, this error can occur.
  Data Source Configuration: The data source may not be set up to allow multiple delta extractions, or it may have reached its limit for delta requests.
  
  Solution:
  
  Check Delta Status: Verify the status of the delta extraction for the specific data source. Ensure that the delta pointer is correctly set and that the previous delta extraction has been completed successfully.
  Reset Delta Pointer: If necessary, reset the delta pointer for the data source. This can usually be done through transaction codes like RSA7 (for delta queue monitoring) or by using specific functions in the data source settings.
  Reinitialize Delta: If the delta extraction needs to be re-run, consider reinitializing the delta process. This may involve performing a full load followed by a delta load.
  Review Data Source Configuration: Ensure that the data source is configured correctly for delta extraction. Check the settings in the data source and make sure that it allows for delta extractions as intended.
  Consult Documentation: Refer to SAP documentation or notes related to the specific data source and delta extraction processes for additional guidance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA3 (for data source extraction), RSA7 (for delta queue monitoring), and RSO2 (for data source maintenance).
  SAP Notes: Check for any SAP Notes related to the specific error message or data source you are working with, as they may provide additional insights or patches.
  Monitoring Tools: Utilize SAP BW monitoring tools to keep track of data loads and delta extractions, which can help identify issues before they lead to errors.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or BW team for further assistance.