How To Fix WO351 - An expression from the workflow container must be specified

SAP Error Message - Details

• Message type: E = Error

• Message class: WO - WF: Messages for Workflow Wizards

• Message number: 351

• Message text: An expression from the workflow container must be specified

What causes this issue?

You wanted to send the definition to recipients, who should be
determined from the workflow at runtime. However, a container element
which contains the recipients at runtime is necessary for this purpose.
You have not specified a container element.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Specify a container element or specify static recipients instead.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WO351 - An expression from the workflow container must be specified ?

  The SAP error message WO351, which states "An expression from the workflow container must be specified," typically occurs in the context of SAP Business Workflow. This error indicates that a workflow step is trying to access a variable or expression from the workflow container, but it is not properly defined or specified.
  Cause:
  
  Missing Workflow Container Element: The workflow is trying to reference a container element that does not exist or has not been initialized.
  Incorrect Expression: The expression used to access the container element may be incorrectly defined or formatted.
  Workflow Definition Issues: There may be issues in the workflow definition itself, such as missing or incorrectly configured steps.
  Data Type Mismatch: The data type of the expression being accessed may not match the expected type in the workflow.
  
  Solution:
  
  Check Workflow Container: Ensure that the container element you are trying to access is defined in the workflow container. You can do this by checking the workflow definition in the SAP Business Workflow Builder (transaction code SWDD).
  Verify Expressions: Review the expressions used in the workflow steps to ensure they are correctly referencing the container elements. Make sure the syntax is correct.
  Initialize Variables: If the container element is supposed to be populated with data, ensure that it is being initialized and populated correctly before it is accessed.
  Debugging: Use the workflow log (transaction code SWI1) to trace the execution of the workflow and identify where the error occurs. This can help pinpoint the exact step that is causing the issue.
  Check Data Types: Ensure that the data types of the variables being used in the expressions match the expected types in the workflow.
  
  Related Information:
  
  Workflow Container: The workflow container is a data structure that holds variables and data relevant to the workflow instance. It is essential for passing data between different steps in the workflow.
  Workflow Builder: The SAP Workflow Builder (SWDD) is the tool used to create and manage workflows in SAP. Familiarity with this tool is crucial for troubleshooting workflow-related issues.
  Transaction Codes:
  
  SWDD: Workflow Builder
  SWI1: Work Item Selection
  SWI2_FREQ: Work Item Selection with Frequency
  
  
  SAP Notes: Check for any relevant SAP Notes or documentation that may provide additional insights or fixes related to this error.
  
  By following these steps and understanding the context of the error, you should be able to resolve the WO351 error in your SAP workflow.