How To Fix RSTRAN518 - Rule (target field: &2): No source field assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: RSTRAN - Messages for Transformation

• Message number: 518

• Message text: Rule (target field: &2): No source 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 RSTRAN518 - Rule (target field: &2): No source field assigned ?

  The SAP error message RSTRAN518 indicates that there is a problem 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 does not have a corresponding source field assigned to it. This can occur during the data loading process when the system is trying to map data from a source to a target but cannot find the necessary mapping for one or more fields.
  Cause:
  
  Missing Mapping: The most common cause is that the transformation does not have a source field assigned to the target field specified in the error message.
  Incorrect Transformation Logic: The transformation logic may not be correctly defined, leading to missing assignments.
  Changes in Data Model: If there have been changes in the data model (e.g., changes in InfoObjects, InfoProviders, or data sources), it may lead to inconsistencies in the mapping.
  Field Deletion: A source field that was previously assigned may have been deleted or renamed, resulting in the target field being left without a source.
  
  Solution:
  
  
  Check Transformation Settings:
  
  Go to the transformation that is causing the error.
  Verify that all target fields have corresponding source fields assigned.
  If a target field is not needed, consider removing it from the transformation.
  
  
  
  Assign Source Fields:
  
  If a target field is required, assign an appropriate source field to it.
  Ensure that the data types and characteristics of the source field match those of the target field.
  
  
  
  Review Data Model Changes:
  
  If there have been recent changes to the data model, review those changes to ensure that they are reflected in the transformation.
  Update the transformation accordingly to accommodate any changes.
  
  
  
  Test the Transformation:
  
  After making the necessary adjustments, test the transformation to ensure that it works correctly without errors.
  
  
  
  Check for Transport Issues:
  
  If the issue arose after a transport, ensure that all necessary objects were transported correctly and that there are no inconsistencies.
  
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like RSO2 (for transformations) to access and modify transformations in SAP BW.
  Documentation: Refer to SAP Help documentation for detailed information on transformations and data modeling in SAP BW.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  
  By following these steps, you should be able to resolve the RSTRAN518 error and ensure that your data transfer process functions correctly.