How To Fix WZ310 - Container could not be constructed from attachment

SAP Error Message - Details

• Message type: E = Error

• Message class: WZ - Workflow: Model objects

• Message number: 310

• Message text: Container could not be constructed from attachment

Self-Explanatory Message

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• What is the cause and solution for SAP error message WZ310 - Container could not be constructed from attachment ?

  SAP Error Message:
  
  WZ310 - Container could not be constructed from attachment
  
  Cause:
  This error typically occurs in SAP Workflow when the system tries to create or fill a workflow container from an attachment (such as a business object or data object linked to the workflow), but fails due to one or more of the following reasons:
  
  The attachment object is missing or not properly linked to the workflow.
  The data structure of the attachment does not match the expected container structure.
  The workflow container element is not correctly defined or is incompatible with the attachment data.
  The attachment is corrupted or incomplete.
  There is a mismatch in the object type or the method used to read the attachment.
  Authorization issues preventing the system from reading the attachment data.
  
  
  Solution:
  To resolve the WZ310 error, consider the following steps:
  
  
  Check Attachment Existence and Linkage:
  
  Verify that the attachment is correctly linked to the workflow instance.
  Use transaction SWI1 (Work Item Selection) or SWI2_FREQ to check workflow logs and attachments.
  
  
  
  Verify Container and Attachment Data Types:
  
  Ensure that the container element in the workflow has the correct data type that matches the attachment.
  Check the workflow definition in transaction PFTC or SWDD and confirm the container element's type.
  
  
  
  Review Workflow Container Mapping:
  
  Confirm that the container element is properly mapped to the attachment.
  If the container expects a certain structure, ensure the attachment provides it.
  
  
  
  Check for Corrupted or Incomplete Attachments:
  
  If possible, reattach the object or recreate the attachment.
  Test with a known good attachment to isolate the problem.
  
  
  
  Authorization Checks:
  
  Ensure the user or system has the necessary authorizations to read the attachment data.
  Check authorization objects related to workflow and business objects.
  
  
  
  Debugging:
  
  Use transaction SWUD or SWDD to debug the workflow.
  Set breakpoints in the container construction logic or in the method that reads the attachment.
  Analyze the runtime behavior to identify where the container construction fails.
  
  
  
  SAP Notes and Support:
  
  Search for relevant SAP Notes using the error message or symptom.
  Sometimes, patches or corrections are available for known issues.
  
  
  
  
  Related Information:
  
  Workflow Container: The container is a data structure that holds all the data elements (variables) used in a workflow step. It can be filled from attachments or passed parameters.
  Attachments in Workflow: Attachments are objects or data linked to a workflow instance, often business objects or data containers.
  Transactions:
  
  SWI1 - Workflow Log and Attachments
  SWI2_FREQ - Frequent Work Items
  SWDD - Workflow Builder
  PFTC - Task Maintenance
  
  
  SAP Notes: Check SAP Support Portal for notes related to WZ310 or container construction issues.
  Common Scenarios: This error often appears when workflows are customized or when new business objects are integrated into workflows without proper container mapping.
  
  
  If you provide more context (e.g., workflow type, business object involved, or recent changes), I can help with more specific guidance.