How To Fix RSTRAN520 - Rule (target field: &2): No target field assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: RSTRAN - Messages for Transformation

• Message number: 520

• Message text: Rule (target field: &2): No target field assigned

What causes this issue?

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

System Response

How to fix this error?

Procedure for System Administrators

Internal rule ID &V1&

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSTRAN520 - Rule (target field: &2): No target field assigned ?

  The SAP error message RSTRAN520 indicates that there is an issue with the data transfer process in SAP BW (Business Warehouse) or SAP BI (Business Intelligence). Specifically, it means that a target field in a transformation rule is not assigned correctly, which prevents the data from being transferred as expected.
  Cause:
  The error typically arises due to one of the following reasons:
  
  Missing Assignment: The target field in the transformation is not assigned to any source field. This can happen if the transformation was not configured correctly.
  Incorrect Mapping: The mapping between the source and target fields may be incorrect or incomplete.
  Changes in Data Model: If there have been changes in the data model (like changes in InfoObjects or InfoProviders), the transformation rules may need to be updated accordingly.
  Data Source Issues: The data source may not have the necessary fields available for mapping.
  
  Solution:
  To resolve the RSTRAN520 error, you can follow these steps:
  
  
  Check Transformation Rules:
  
  Go to the transformation that is causing the error.
  Verify that all target fields are correctly assigned to their corresponding source fields.
  Ensure that there are no empty target fields in the transformation.
  
  
  
  Update Mapping:
  
  If you find any target fields that are not assigned, assign them to the appropriate source fields.
  If necessary, create new mappings for any new fields that have been added to the source.
  
  
  
  Validate Data Model:
  
  Check if there have been any changes to the InfoObjects or InfoProviders that might affect the transformation.
  If changes have been made, update the transformation rules accordingly.
  
  
  
  Test the Transformation:
  
  After making the necessary changes, test the transformation to ensure that it works without errors.
  You can do this by executing the data transfer process again.
  
  
  
  Check for Data Source Issues:
  
  Ensure that the data source is correctly configured and that it contains all the necessary fields for the transformation.
  
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like RSA1 (Data Warehousing Workbench) to access the transformation and check the settings.
  Documentation: Refer to SAP documentation for detailed information on transformations and data modeling in BW/BI.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message.
  
  By following these steps, you should be able to identify and resolve the cause of the RSTRAN520 error in your SAP BW/BI environment.