How To Fix WD447 - Workflow container does not contain multi-line elements

SAP Error Message - Details

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 447

• Message text: Workflow container does not contain multi-line elements

Self-Explanatory Message

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• What is the cause and solution for SAP error message WD447 - Workflow container does not contain multi-line elements ?

  Certainly! Here's a detailed explanation regarding the SAP error message WD447: Workflow container does not contain multi-line elements:
  
  Error Message:
  WD447 - Workflow container does not contain multi-line elements
  
  Cause:
  This error occurs in SAP Web Dynpro when a workflow container is expected to contain multi-line elements (such as internal tables or multi-line structures), but the container does not have any such elements defined.
  More specifically:
  
  The Web Dynpro component or application is trying to bind or process a workflow container attribute that should be a multi-line element (e.g., an internal table or a structure with multiple entries).
  However, the workflow container attribute is either missing, incorrectly defined, or is a single-line element (like a scalar or single structure) instead of a multi-line element.
  This mismatch causes the runtime to throw the WD447 error.
  
  
  When does this typically happen?
  
  When integrating SAP Business Workflow with Web Dynpro applications.
  When a Web Dynpro component expects a multi-line container element (e.g., for table UI elements) but the workflow container does not provide it.
  During the binding of UI elements (like tables or lists) to workflow container attributes.
  When the workflow container attribute is incorrectly defined in the workflow or the interface.
  
  
  Solution:
  
  
  Check the Workflow Container Definition:
  
  Go to the workflow definition in transaction SWDD.
  Verify the container attributes.
  Ensure that the attribute you are trying to bind to the Web Dynpro UI is defined as a multi-line element (usually an internal table or a table type).
  
  
  
  Check the Data Types:
  
  Confirm that the data type of the container attribute is a table type (e.g., TABLE OF <structure>).
  If it is a single structure or scalar, change it to a table type if the UI expects multiple lines.
  
  
  
  Adjust the Web Dynpro Component:
  
  In the Web Dynpro component, check the context node that is bound to the workflow container attribute.
  Ensure that the context node is defined as a table node (multi-line).
  The binding between the workflow container and the Web Dynpro context node must be consistent in terms of cardinality (single vs multiple).
  
  
  
  Re-bind the Workflow Container Attribute:
  
  In the Web Dynpro application configuration or the workflow task, re-bind the container attribute to the correct multi-line element.
  
  
  
  Regenerate or Re-import Data Types if Needed:
  
  Sometimes, data types might be outdated or inconsistent.
  Regenerate or re-import the data dictionary types used in the workflow container.
  
  
  
  Test the Workflow and Web Dynpro Application:
  
  After corrections, test the workflow task and the Web Dynpro UI to ensure the multi-line data is passed and displayed correctly.
  
  
  
  
  Additional Information:
  
  SAP Notes: Check for any SAP Notes related to WD447 for your specific SAP version.
  Debugging: Use the debugger to check the container contents at runtime.
  Related Transactions:
  
  SWDD - Workflow Builder
  SE80 or SE24 - For checking data types and Web Dynpro components
  SE41 - For checking GUI status if relevant
  
  
  Common Scenario: This error is common when a workflow task is linked to a Web Dynpro UI that displays a table, but the workflow container attribute is mistakenly defined as a single structure.
  
  
  Summary:
  
  
  
  Aspect
  Description
  
  
  
  
  Cause
  Workflow container attribute expected to be multi-line (table) but is not defined as such.
  
  
  Solution
  Define the container attribute as a table type; ensure Web Dynpro context node matches this.
  
  
  Check
  Workflow container definition, data types, Web Dynpro context node binding.
  
  
  
  
  If you provide the exact scenario or code snippet, I can help you with more specific guidance!