How To Fix CL746 - Assignment of class "&" to class "&" changed

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 746

• Message text: Assignment of class "&" to class "&" changed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CL746 - Assignment of class "&" to class "&" changed ?

  The SAP error message CL746, which states "Assignment of class '&' to class '&' changed," typically occurs in the context of Object-Oriented Programming in ABAP when there is a change in the class hierarchy or the assignment of classes. This error indicates that there has been a modification in the inheritance structure of the classes involved, which can lead to inconsistencies in the system.
  Cause:
  
  Class Redefinition: The class that is being assigned has been redefined or modified, which may include changes in its parent class or the interfaces it implements.
  Transport Issues: If the classes are being transported between different systems (e.g., from development to quality assurance), there may be inconsistencies in the class definitions.
  Version Conflicts: Different versions of the same class may exist in different environments, leading to assignment issues.
  Namespace Conflicts: If classes are defined in different namespaces, it may lead to conflicts when trying to assign one class to another.
  
  Solution:
  
  Check Class Definitions: Review the class definitions for both the source and target classes to ensure that they are correctly defined and that the inheritance structure is as expected.
  Rebuild Class: If the class has been modified, you may need to regenerate or recompile the class to ensure that all changes are reflected correctly.
  Transport Consistency: Ensure that all relevant transports have been correctly imported into the target system. Check for any missing transports that may contain class definitions.
  Clear Buffer: Sometimes, clearing the SAP buffer can help resolve inconsistencies. You can do this by using transaction code SM12 to delete any locks and SM21 to check the system log for any related issues.
  Check for Dependencies: Ensure that all dependent classes and interfaces are also correctly defined and consistent across the systems.
  Use Transaction SE80: Use the Object Navigator (SE80) to check the class hierarchy and ensure that the relationships are correctly established.
  
  Related Information:
  
  Class Hierarchy: Understanding the class hierarchy and how classes are related is crucial in resolving this error. You can view the class hierarchy in transaction SE80.
  ABAP Documentation: Refer to the official SAP documentation for Object-Oriented Programming in ABAP for more insights into class definitions and inheritance.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions to common problems.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or ABAP development team for further investigation.