How To Fix SWF_UTL_000120 - Structures of type '&1' cannot be assigned any constants

SAP Error Message - Details

• Message type: E = Error

• Message class: SWF_UTL_000 - Messages for I/O - Service Class CL_SWF_IO_SERVICES

• Message number: 120

• Message text: Structures of type '&1' cannot be assigned any constants

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 SWF_UTL_000120 - Structures of type '&1' cannot be assigned any constants ?

  The SAP error message SWF_UTL_000120 indicates that there is an issue with the assignment of constants to structures of a specific type in your workflow or program. This error typically arises when you attempt to assign a constant value to a field in a structure that is not designed to accept constants, or when the structure is defined in a way that does not allow for such assignments.
  Cause:
  
  Structure Definition: The structure you are trying to assign a constant to may not have been defined to accept constant values. This can happen if the structure is defined with reference types or if it has specific constraints.
  Data Type Mismatch: The constant you are trying to assign may not match the expected data type of the field in the structure.
  Workflow Configuration: If this error occurs in the context of a workflow, it may be due to incorrect configuration or usage of workflow elements that expect different data types.
  
  Solution:
  
  Check Structure Definition: Review the definition of the structure (using transaction SE11) to ensure that it allows for the assignment of constants. If necessary, modify the structure to accommodate the required assignments.
  Data Type Verification: Ensure that the constant you are trying to assign matches the data type of the field in the structure. If there is a mismatch, you may need to convert the constant to the appropriate type.
  Workflow Configuration: If the error is occurring within a workflow, check the workflow configuration to ensure that the correct data types are being used in the workflow steps. Make sure that the workflow elements are properly configured to handle the data types being passed.
  Use of Constants: If you need to assign a constant value, consider using a variable or a field that is compatible with the structure instead of a constant.
  
  Related Information:
  
  Transaction Codes: Use transaction SE11 to view and modify the structure definition, and SE80 to check the workflow configuration.
  Documentation: Refer to SAP documentation for details on data types and structures, as well as best practices for workflow design.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on handling similar issues.
  
  If the problem persists after checking these areas, consider reaching out to your SAP support team or consulting the SAP Community for further assistance.