How To Fix RSDS366 - Reset delta and delete target tables before activation of DataSource

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDS - New DataSource

• Message number: 366

• Message text: Reset delta and delete target tables before activation of DataSource

What causes this issue?

The DataSource points to a remote source object, which has changed in an
incompatible way. A remote subscription is active or data has already
been replicated to the target table.

System Response

Activation of the DataSource will drop and re-create the remote
subscription(s) and target table(s). To prevent unintended data loss,
the remote subscription has to be reset and the target table (content)
has to be deleted manually before the DataSource is activated.

How to fix this error?

If necessary, transfer the data from the target table to a safe
location. There is no automated recovery mechanism.
Choose "Manage..." on the tab "Extraction" and then "Reset" on the
following screen to reset delta and delete the target table content.
Activate the DataSource to drop and re-create the remote subscription(s)
and target table(s) reflecting the incompatible changes in the remote
source.
Finally choose "Manage..." again on the tab "Extraction" and perform a
new delta initialization for the remote subscription(s) or use a process
chain.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSDS366 - Reset delta and delete target tables before activation of DataSource ?

  The SAP error message RSDS366 indicates that there is an issue with the delta mechanism of a DataSource in SAP BW (Business Warehouse). This error typically occurs when you are trying to activate a DataSource that has delta capabilities, but the delta queue is not in a proper state. Specifically, it suggests that you need to reset the delta and delete the target tables before you can activate the DataSource.
  Cause:
  The error can occur due to several reasons:
  
  Delta Queue Issues: The delta queue may contain inconsistent or outdated data.
  Previous Delta Loads: If there were previous delta loads that did not complete successfully, it can lead to inconsistencies.
  Changes in DataSource: If the structure of the DataSource has changed, it may require a reset of the delta mechanism.
  DataSource Activation: Attempting to activate a DataSource that has not been properly reset can trigger this error.
  
  Solution:
  To resolve the RSDS366 error, follow these steps:
  
  
  Reset Delta:
  
  Go to transaction code RSA1 (Data Warehousing Workbench).
  Navigate to the DataSource that is causing the issue.
  Right-click on the DataSource and select "Manage" or "Reset Delta".
  This will reset the delta mechanism for the DataSource.
  
  
  
  Delete Target Tables:
  
  Identify the target InfoObjects or InfoProviders that are associated with the DataSource.
  Use transaction code SE14 (Database Utility) to delete the target tables.
  Ensure that you delete the relevant tables that are linked to the DataSource.
  
  
  
  Re-activate the DataSource:
  
  After resetting the delta and deleting the target tables, go back to the DataSource in RSA1.
  Right-click on the DataSource and select "Activate".
  This should allow you to activate the DataSource without encountering the RSDS366 error.
  
  
  
  Check for Errors:
  
  After activation, monitor the delta queue and ensure that there are no further errors.
  You can check the delta queue using transaction code RSA7.
  
  
  
  Related Information:
  
  Delta Mechanism: Understand how the delta mechanism works in SAP BW, including the types of delta (full, delta, and real-time).
  DataSource Management: Familiarize yourself with managing DataSources in SAP BW, including activation, deactivation, and troubleshooting.
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or updates related to this error.
  
  By following these steps, you should be able to resolve the RSDS366 error and successfully activate your DataSource.