How To Fix WK314 - Error when calling structure (Tree Control)

SAP Error Message - Details

• Message type: E = Error

• Message class: WK - BPT: Messages integr. inbox

• Message number: 314

• Message text: Error when calling structure (Tree Control)

Self-Explanatory Message

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• What is the cause and solution for SAP error message WK314 - Error when calling structure (Tree Control) ?

  SAP Error WK314: Error when calling structure (Tree Control)
  
  Cause:
  The error message WK314 typically occurs in SAP Workflow when there is an issue related to the Tree Control structure used in the workflow container or task processing. Specifically, it happens when the system tries to access or call a structure (often a container element or a workflow object) that is either:
  
  Not properly defined or initialized,
  Missing or deleted,
  Has an incorrect data type or structure mismatch,
  Or when the workflow container elements are inconsistent or corrupted.
  
  In many cases, this error arises during the display or processing of workflow tasks that involve hierarchical data structures (tree controls), such as organizational trees, task hierarchies, or container elements that are expected to be structured data but are not correctly set.
  
  Common Scenarios:
  
  Workflow container elements expected to be structures or tables are empty or not filled.
  Custom workflow tasks or methods that manipulate container elements incorrectly.
  Issues in the workflow template where container elements are not properly mapped.
  Problems in the user interface (SAP GUI) when rendering tree controls due to missing or inconsistent data.
  
  
  Solution:
  
  
  Check Workflow Container Elements:
  
  Verify that all container elements used in the workflow task or step are correctly defined.
  Ensure that the data types match the expected structures.
  Use transaction SWUS or SWI1 to inspect the workflow container and its elements.
  
  
  
  Initialize Container Elements Properly:
  
  Make sure that the container elements are initialized before they are accessed.
  If the element is a structure or table, ensure it is not empty or null when the tree control tries to display it.
  
  
  
  Review Workflow Template:
  
  Open the workflow template in SWDD and check the container elements and their mapping.
  Correct any inconsistencies or missing elements.
  
  
  
  Debug the Workflow:
  
  Use the workflow debugger (SWI1 or SWI2_FREQ) to trace the workflow execution.
  Check where the error occurs and inspect the container contents at runtime.
  
  
  
  Check Custom Code:
  
  If custom methods or function modules are used to fill or manipulate the container, review the code for correctness.
  Ensure that the structures passed to the tree control are properly populated.
  
  
  
  SAP Notes and Patches:
  
  Search for relevant SAP Notes that address WK314 or tree control issues in workflows.
  Apply any recommended patches or corrections.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SWDD - Workflow Builder (to check workflow templates)
  SWUS - Workflow Container Elements
  SWI1 - Workflow Log
  SWI2_FREQ - Workflow Runtime Analysis
  
  
  
  SAP Notes:
  
  Check SAP Support Portal for notes related to WK314 or tree control errors in workflows.
  
  
  
  Documentation:
  
  SAP Help Portal on Workflow container elements and tree controls.
  SAP Community forums for similar issues and solutions.
  
  
  
  
  Summary:
  WK314 error is caused by problems in accessing or displaying a structure in the workflow tree control, often due to missing, uninitialized, or mismatched container elements. The solution involves verifying and correcting the workflow container definitions, ensuring proper initialization, debugging the workflow, and checking for relevant SAP Notes.
  
  If you provide more context (e.g., the exact workflow step, container elements involved, or custom code), I can help with a more specific diagnosis.