How To Fix SWF_BND_001013 - The Value of Expression '&1' Cannot Serve As the Source of an Assignment

SAP Error Message - Details

• Message type: E = Error

• Message class: SWF_BND_001 - Messages for workflow binding class

• Message number: 013

• Message text: The Value of Expression '&1' Cannot Serve As the Source of an Assignment

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SWF_BND_001013 - The Value of Expression '&1' Cannot Serve As the Source of an Assignment ?

  The SAP error message SWF_BND_001013 indicates that there is an issue with an expression in a workflow binding. Specifically, the message states that the value of the expression &1 cannot serve as the source of an assignment. This typically occurs in the context of workflow definitions where data binding is involved.
  Cause:
  The error usually arises due to one of the following reasons:
  
  
  Data Type Mismatch: The expression being evaluated does not match the expected data type for the assignment. For example, trying to assign a string value to a numeric field.
  
  
  Invalid Expression: The expression itself may be invalid or not properly defined, leading to an inability to evaluate it correctly.
  
  
  Scope Issues: The variable or expression may not be accessible in the current context or scope of the workflow.
  
  
  Null or Undefined Values: The expression might be returning a null or undefined value, which cannot be assigned to the target variable.
  
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Data Types: Ensure that the data types of the source and target variables match. If necessary, convert the data type of the source expression to match the target.
  
  
  Validate Expressions: Review the expression for any syntax errors or logical issues. Make sure that it is correctly defined and can be evaluated.
  
  
  Scope Verification: Ensure that the variable or expression you are trying to use is defined and accessible in the current context of the workflow.
  
  
  Debugging: Use debugging tools available in SAP to trace the execution of the workflow and identify where the error occurs. This can help you pinpoint the exact expression causing the issue.
  
  
  Check for Null Values: Ensure that the expression does not return null or undefined values. You may need to add checks or default values to handle such cases.
  
  
  Consult Documentation: Refer to SAP documentation or community forums for additional insights or similar issues encountered by other users.
  
  
  Related Information:
  
  Workflow Binding: Understanding how data binding works in SAP workflows can help you avoid similar issues in the future. Familiarize yourself with the binding syntax and rules.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, specific versions of SAP may have bugs that are documented in SAP Notes.
  SAP Community: Engage with the SAP Community forums to seek advice from other users who may have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify and resolve the cause of the SWF_BND_001013 error in your SAP workflow.