How To Fix SIW042 - Reference field missing in &1 &2

SAP Error Message - Details

• Message type: E = Error

• Message class: SIW - Service Implementation Workbench

• Message number: 042

• Message text: Reference field missing in &1 &2

What causes this issue?

The system has checked the existing mapping information and has
identified missing information. Some fields require reference field
information (for example the fields of the field types <NP>amount</> and
<NP>quantity)</>. The reference field is missing for the identified
field.

System Response

The system terminates processing and does not execute subsequent steps
such as proxy generation or generation of implementations.

How to fix this error?

Enter the relevant reference field on the mapping screen.

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 SIW042 - Reference field missing in &1 &2 ?

  The SAP error message SIW042, which states "Reference field missing in &1 &2," typically occurs in the context of SAP's Information Steward or Data Services when there is an issue with the data quality or data profiling process. This error indicates that a reference field, which is expected to be present in the specified data object (like a table or a data flow), is missing.
  Cause:
  
  
  Missing Reference Field: The primary cause of this error is that the data structure (like a table or a data flow) does not contain a field that is expected to be there. This could be due to:
  
  Changes in the data model where the reference field was removed or renamed.
  Incorrect configuration or mapping in the data flow.
  Data extraction issues where the reference field was not included in the extraction process.
  
  
  
  Data Quality Issues: If the data is being validated or profiled, the absence of a reference field can lead to this error, especially if the validation rules expect that field to be present.
  
  
  Solution:
  
  
  Check Data Structure: Verify the data structure of the object referenced in the error message (the placeholders &1 and &2 will indicate the specific object). Ensure that the reference field is indeed present in the data model.
  
  
  Update Data Flow/Mapping: If the reference field has been renamed or removed, update the data flow or mapping configuration to reflect the current data model. Ensure that all necessary fields are included in the data extraction and transformation processes.
  
  
  Review Data Quality Rules: If the error arises during data profiling or validation, review the data quality rules to ensure they are aligned with the current data structure. Modify the rules if necessary to accommodate any changes in the data model.
  
  
  Consult Documentation: Check SAP documentation or support notes related to the specific version of SAP you are using. There may be additional insights or updates that address this error.
  
  
  Testing: After making the necessary changes, run the data flow or validation process again to ensure that the error has been resolved.
  
  
  Related Information:
  
  SAP Notes: Look for SAP Notes related to SIW042 for any specific patches or updates that may address this issue.
  Data Services Documentation: Review the SAP Data Services documentation for best practices on data modeling and data quality management.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed, providing insights or solutions from other users.
  
  By following these steps, you should be able to identify the cause of the SIW042 error and implement a solution to resolve it.