How To Fix SIW120 - Structure &3: Object Reference Type &1 is invalid in field &2

SAP Error Message - Details

• Message type: E = Error

• Message class: SIW - Service Implementation Workbench

• Message number: 120

• Message text: Structure &3: Object Reference Type &1 is invalid in field &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message SIW120 - Structure &3: Object Reference Type &1 is invalid in field &2 ?

  The SAP error message SIW120 indicates that there is an issue with the object reference type in a specific field of a structure. This error typically arises in the context of ABAP programming or when working with data structures in SAP.
  Cause:
  The error message "SIW120 Structure &3: Object Reference Type &1 is invalid in field &2" usually occurs due to one of the following reasons:
  
  
  Invalid Object Reference: The object reference type specified in the field is not valid or not compatible with the expected type. This can happen if the field is expecting a certain type of object reference, but a different or incorrect type is provided.
  
  
  Data Type Mismatch: There may be a mismatch between the data type defined in the structure and the data type being assigned to it. For example, if a field is defined to hold a certain type of object reference, but the code attempts to assign a different type, this error will occur.
  
  
  Incorrect Structure Definition: The structure itself may be incorrectly defined, leading to inconsistencies in the expected object types.
  
  
  Solution:
  To resolve the SIW120 error, you can follow these steps:
  
  
  Check Structure Definition: Review the definition of the structure mentioned in the error message (indicated by &3). Ensure that the fields are defined with the correct data types and object reference types.
  
  
  Verify Object Reference Types: Check the object reference type indicated by &1. Ensure that it is a valid type and that it matches the expected type for the field indicated by &2.
  
  
  Debugging: If you are working with ABAP code, use the debugger to trace the point where the error occurs. Check the values being assigned to the fields and ensure they are of the correct type.
  
  
  Type Casting: If necessary, consider using type casting to convert the object reference to the expected type, but ensure that this is done safely to avoid runtime errors.
  
  
  Consult Documentation: If you are unsure about the expected types, consult the SAP documentation or the data dictionary (SE11) for the structure and its fields.
  
  
  Code Review: If the error is occurring in custom code, review the code logic to ensure that the correct object types are being used throughout the program.
  
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE11 (Data Dictionary) to check the structure definitions and SE80 (Object Navigator) to review the related programs or classes.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Community Forums: Consider searching or posting on SAP community forums for additional insights or similar experiences from other users.
  
  By following these steps, you should be able to identify and resolve the cause of the SIW120 error in your SAP environment.