How To Fix RSDS338 - Generic delta has to be defined on &1 field &2

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDS - New DataSource

• Message number: 338

• Message text: Generic delta has to be defined on &1 field &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSDS338 - Generic delta has to be defined on &1 field &2 ?

  The SAP error message RSDS338, which states "Generic delta has to be defined on &1 field &2," typically occurs in the context of DataSources in SAP BW (Business Warehouse) when you are trying to set up a delta mechanism for a DataSource that does not have a proper delta configuration.
  Cause:
  The error indicates that the DataSource you are working with is expected to support delta processing, but it lacks the necessary configuration for a generic delta. This usually happens when:
  
  The DataSource is not set up correctly to handle delta loads.
  The field specified in the error message does not have a delta field defined.
  The DataSource is not configured to use a specific field for delta tracking.
  
  Solution:
  To resolve the RSDS338 error, you can follow these steps:
  
  
  Check DataSource Configuration:
  
  Go to the DataSource in the SAP BW system (transaction code RSA1).
  Navigate to the DataSource in question and check its settings.
  Ensure that the DataSource is configured for delta processing.
  
  
  
  Define Generic Delta:
  
  If the DataSource is intended to use a generic delta, you need to define the delta field.
  In the DataSource maintenance screen, look for the option to define a generic delta. This usually involves specifying a field that can be used to track changes (e.g., a timestamp or a change indicator).
  
  
  
  Use a Suitable Field:
  
  Ensure that the field you are trying to use for delta processing is suitable. It should be a field that can reliably indicate changes in the data (e.g., a last modified date).
  
  
  
  Activate the DataSource:
  
  After making the necessary changes, make sure to activate the DataSource again. This can be done in the DataSource maintenance screen.
  
  
  
  Test the Delta Load:
  
  After configuration, perform a test delta load to ensure that the changes are being captured correctly.
  
  
  
  Related Information:
  
  Delta Mechanisms: In SAP BW, delta mechanisms are crucial for efficient data loading. They allow you to load only the changes made since the last load, rather than reloading the entire dataset.
  DataSource Types: Understand the different types of DataSources (e.g., standard, generic, and ODP) and their configurations.
  SAP Notes: Check for any relevant SAP Notes that might provide additional guidance or fixes related to this error.
  
  If you continue to experience issues after following these steps, consider consulting with your SAP BW administrator or reaching out to SAP support for further assistance.