How To Fix RD174 - 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: 174

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

What causes this issue?

Conversion to the generic delta method is currently not possible
because the status of DataSource &V1& does not permit a delta.

System Response

The conversion cannot be performed.

How to fix this error?

First run a delta init 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 RD174 - Conversion to generic delta is currently not possible. See long text ?

  The SAP error message RD174, 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 BI (Business Intelligence) when there is an issue with the delta process for data extraction.
  Cause:
  The error can arise due to several reasons, including:
  
  
  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 populated.
  
  
  Data Model Changes: Changes in the underlying data model (like changes in the structure of the InfoSource or InfoObject) can lead to issues with delta extraction.
  
  
  Missing Delta Initialization: If the delta initialization has not been performed, the system may not be able to convert to a generic delta.
  
  
  Technical Issues: There could be technical issues or bugs in the SAP system that prevent the delta process from functioning correctly.
  
  
  Solution:
  To resolve the RD174 error, you can take the following steps:
  
  
  Check Data Source Configuration: Ensure that the data source is correctly configured for delta extraction. Verify the settings in the source system and the BW system.
  
  
  Perform Delta Initialization: If you have not done so, perform a delta initialization for the data source. This is often necessary before you can start using delta loads.
  
  
  Monitor Delta Queue: Check the delta queue in the source system to ensure that it is populated and that there are no errors. You can use transaction codes like RSA7 to monitor the delta queue.
  
  
  Review Data Model Changes: If there have been recent changes to the data model, ensure that they are compatible with the delta extraction process. You may need to adjust the data source or InfoObject settings accordingly.
  
  
  Check for Technical Issues: Look for any known issues or patches related to your SAP version that might affect delta extraction. Consult SAP Notes or the SAP Support Portal for guidance.
  
  
  Consult Long Text: The error message often has a long text that provides additional context or specific instructions. Make sure to review this long text for any additional insights.
  
  
  Recreate Data Source: In some cases, it may be necessary to recreate the data source or the InfoPackage associated with it.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench), RSA7 (Delta Queue Monitor), and RSO2 (DataSource Maintenance).
  SAP Notes: Search for SAP Notes related to RD174 or delta extraction issues for specific fixes or recommendations.
  Documentation: Review SAP documentation on delta extraction processes and best practices for configuring data sources.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage with SAP support for further assistance.