How To Fix RSTRAN517 - Rule (target field: &2): No source unit assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: RSTRAN - Messages for Transformation

• Message number: 517

• Message text: Rule (target field: &2): No source unit 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 RSTRAN517 - Rule (target field: &2): No source unit assigned ?

  The SAP error message RSTRAN517 indicates that there is an issue with the data transfer process in SAP BW (Business Warehouse) or SAP BI (Business Intelligence). Specifically, the error states that there is no source unit assigned for a target field in a transformation rule. This typically occurs during the data loading process when the system is unable to find a corresponding source unit for a target field in the transformation.
  Cause:
  
  Missing Source Assignment: The target field in the transformation does not have a corresponding source field assigned. This can happen if the transformation was not properly configured or if the source data structure has changed.
  Incorrect Mapping: The mapping between the source and target fields may be incorrect or incomplete.
  Data Source Changes: Changes in the data source structure (like adding or removing fields) that are not reflected in the transformation rules can lead to this error.
  Transformation Errors: Errors in the transformation logic or rules that prevent the system from correctly identifying the source unit.
  
  Solution:
  
  Check Transformation Rules: Go to the transformation in the SAP BW system and verify that all target fields have corresponding source fields assigned. Ensure that the mapping is correct.
  Update Source Structure: If the source data structure has changed, update the transformation to reflect these changes. This may involve reassigning fields or adding new mappings.
  Validate Data Source: Ensure that the data source (InfoSource, DataSource, etc.) is correctly set up and that it contains the necessary fields.
  Test Transformation: After making changes, test the transformation to ensure that it works correctly without errors.
  Check for Errors in Data Flow: Review the entire data flow from the source to the target to identify any other potential issues that may be causing the error.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like RSO2 (for transformations) and RSA1 (for data modeling) to access and modify transformation rules.
  Documentation: Refer to SAP Help documentation for detailed guidance on setting up transformations and troubleshooting data loading issues.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message or provide patches and updates.
  
  By following these steps, you should be able to resolve the RSTRAN517 error and ensure that your data transfer process functions correctly.