How To Fix CL784 - Assignment of class & to class & must not occur more than once

CL784 - Overview

• Message type: E = Error

• Message class: CL - Classification

• Message number: 784

• Message text: Assignment of class & to class & must not occur more than once

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CL784 - Assignment of class & to class & must not occur more than once ?

  The SAP error message CL784, which states "Assignment of class & to class & must not occur more than once," typically occurs in the context of class hierarchies in the SAP system, particularly when dealing with Object-Oriented Programming (OOP) in ABAP or when managing class definitions in the SAP Business Object Model.
  
  Cause:
  This error arises when there is an attempt to assign a class to another class more than once in the class hierarchy. In SAP, each class can only be assigned to another class (as a subclass) once. If you try to create a duplicate assignment, the system will throw this error to prevent inconsistencies in the class structure.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Class Assignments: Review the class assignments in the Class Builder (transaction code SE24). Look for the class that is causing the issue and check its superclass assignments.
  
  
  Remove Duplicate Assignments: If you find that