How To Fix WF_CONT005 - Migration class "&1" must implement interface "&"

SAP Error Message - Details

• Message type: E = Error

• Message class: WF_CONT - Workflow Container, Definition Time and Runtime

• Message number: 005

• Message text: Migration class "&1" must implement interface "&"

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• What is the cause and solution for SAP error message WF_CONT005 - Migration class "&1" must implement interface "&" ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WF_CONT005 Migration class "&1" must implement interface "&2"
  
  Cause:
  This error occurs during workflow container migration or when a migration class is assigned to a workflow container element, but the specified migration class does not implement the required interface.
  In SAP Workflow, migration classes are used to convert container elements from one type to another during workflow template migration or upgrade. SAP expects that any migration class assigned to a container element must implement a specific interface to ensure it provides the necessary methods for migration.
  The error message indicates that the migration class you have specified (parameter &1) does not implement the required interface (parameter &2).
  
  What does it mean?
  
  Migration class: A class that handles the conversion of container element data types during workflow migration.
  Interface: A set of methods that the migration class must implement to be compatible with the workflow migration framework.
  The workflow engine checks if the migration class implements the required interface. If not, it raises this error.
  
  
  Typical scenario:
  
  You assign a migration class to a container element in transaction SWDD (Workflow Builder) or during migration.
  The migration class is custom or standard but does not implement the interface IF_WF_MIGRATION (or another required interface).
  When the workflow system tries to use this class for migration, it throws the error.
  
  
  Required Interface:
  Usually, the required interface is:
  
  IF_WF_MIGRATION
  
  or  
  IF_WF_MIGRATION_CONTAINER
  
  or another interface depending on the context.
  
  You can check the exact interface name in the error message (&2).
  
  Solution:
  
  
  Check the migration class:
  
  Go to SE24 (Class Builder).
  Enter the migration class name (&1).
  Check the Interfaces tab.
  Verify if the class implements the required interface (&2).
  
  
  
  Implement the required interface:
  
  If the class does not implement the interface, you need to modify the class to implement it.
  Add the interface to the class.
  Implement all required methods of the interface.
  Save and activate the class.
  
  
  
  Use a correct migration class:
  
  If you cannot modify the class, assign a different migration class that already implements the required interface.
  You can check standard SAP migration classes or create a new one.
  
  
  
  Check workflow container element settings:
  
  In transaction SWDD, check the container element's migration class assignment.
  Correct the migration class if necessary.
  
  
  
  
  Additional Information:
  
  Interface IF_WF_MIGRATION defines methods like MIGRATE which are called during migration.
  Migration classes are typically used when the data type of a container element changes between workflow versions.
  Proper implementation ensures smooth migration of workflow instances and templates.
  If you are upgrading SAP or migrating workflows, ensure all custom migration classes comply with the interface requirements.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  Migration class "&1" must implement interface "&2"
  
  
  Cause
  Migration class does not implement required interface
  
  
  Solution
  Implement the interface in the class or assign a correct class
  
  
  Transaction
  SE24 (Class Builder), SWDD (Workflow Builder)
  
  
  Interface
  Usually IF_WF_MIGRATION or similar
  
  
  
  
  If you need help with the interface methods or example implementation, feel free to ask!