How To Fix RD175 - Conversion to generic delta is currently not possible. See long text

SAP Error Message - Details

• Message type: E = Error

• Message class: RD - CO-PA Connection to SAP BW

• Message number: 175

• Message text: Conversion to generic delta is currently not possible. See long text

What causes this issue?

Conversion of the DataSource &V1& to a generic delta method is
currently not possible because assignment changes have been made since
the last delta.

System Response

The conversion cannot be performed.

How to fix this error?

First run a DeltaInit for DataSource &V1& and start the conversion to a
generic delta method again.

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 RD175 - Conversion to generic delta is currently not possible. See long text ?

  The SAP error message RD175, which states "Conversion to generic delta is currently not possible. See long text," typically occurs in the context of SAP BW (Business Warehouse) or SAP BW/4HANA when there is an issue with the delta process for data extraction. This error can arise during the process of converting a delta data source to a generic delta data source.
  Causes:
  
  Data Source Configuration: The data source may not be properly configured for delta extraction. This can happen if the delta mechanism is not set up correctly in the source system.
  Delta Queue Issues: There may be issues with the delta queue, such as it being empty or not properly initialized.
  Data Model Changes: Changes in the underlying data model (like changes in the structure of the source table) can lead to inconsistencies that prevent delta extraction.
  Missing or Incorrect Delta Initialization: If the delta initialization has not been performed correctly, the system may not be able to convert to a generic delta.
  Technical Issues: There could be technical issues in the source system or in the BW system that are preventing the delta process from functioning correctly.
  
  Solutions:
  
  Check Data Source Configuration: Ensure that the data source is correctly configured for delta extraction. Verify the settings in the source system and in the BW system.
  Initialize Delta: If the delta initialization has not been performed, or if it was done incorrectly, you may need to reinitialize the delta. This involves performing a full load followed by a delta load.
  Monitor Delta Queue: Check the delta queue for any issues. You can use transaction codes like RSA7 to monitor the delta queue and ensure that it is functioning correctly.
  Review Data Model Changes: If there have been changes to the underlying data model, ensure that the data source is updated accordingly. You may need to adjust the data source or perform a new initialization.
  Check for Technical Issues: Look for any technical issues in the source or BW system that may be affecting the delta process. This could include checking logs for errors or warnings.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench), RSA7 (Delta Queue Monitor), and RSO2 (Data Source Maintenance).
  SAP Documentation: Review SAP documentation related to delta extraction and data sources for best practices and troubleshooting steps.
  SAP Community: Engage with the SAP Community forums for insights and solutions shared by other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to involve your SAP Basis or BW team for further investigation and support.