How To Fix CL179 - Class type "&" has exactly one object type: "&"

CL179 - Overview

• Message type: E = Error

• Message class: CL - Classification

• Message number: 179

• Message text: Class type "&" has exactly one object type: "&"

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 CL179 - Class type "&" has exactly one object type: "&" ?

  The SAP error message CL179 indicates that there is an issue with the class type definition in the ABAP Object-Oriented programming environment. Specifically, the message states that the class type you are trying to define or work with has exactly one object type associated with it, which can lead to confusion or conflicts in the system.
  
  Cause:
  The error typically arises in the following scenarios:
  
  Class Definition Issues: You may be trying to define a class that is expected to have multiple object types, but the system recognizes only one.
  Inheritance Problems: If you are trying to inherit from a class that has a specific object type, and your class definition does not align with the expected structure, this error can occur.
  Incorrect Class Type Usage: You might be using a class type in a way that is not supported by the system, such as trying to instantiate or reference it incorrectly.
  
  
  Solution:
  To resolve the CL179