How To Fix R-343 - In a class supplement, only one class may be extended

R-343 - Overview

• Message type: E = Error

• Message class: R- -

• Message number: 343

• Message text: In a class supplement, only one class may be extended

Self-Explanatory Message

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R-343 - Details

• The SAP error message R-343, which states "In a class supplement, only one class may be extended," typically occurs in the context of class definitions in the ABAP programming environment. This error arises when you attempt to extend more than one class in a class supplement, which is not allowed in SAP's object-oriented programming model.
  
  Cause:
  The error is caused by the following:
  
  In ABAP, a class supplement is a way to add additional methods or attributes to an existing class. However, the rules dictate that a class supplement can only extend one class at a time.
  If you try to extend multiple classes in a single class supplement, the system will throw this error.
  
  
  Solution:
  To resolve this error, you should:
  
  
  Check the Class Supplement: Review the class supplement code to ensure that it is only extending one class. If you find that it is attempting to extend multiple classes, you will need to separate them.
  
  
  Create