How To Fix OO150 - Invalid class or interface name &

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 150

• Message text: Invalid class or interface name &

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO150 - Invalid class or interface name & ?

  The SAP error message OO150 "Invalid class or interface name" typically occurs when there is an issue with the naming or definition of a class or interface in ABAP (Advanced Business Application Programming). This error can arise due to various reasons, including:
  Causes:
  
  
  Invalid Naming Conventions: The class or interface name may not adhere to the naming conventions set by SAP. For example, names must start with a letter and can only contain letters, numbers, and underscores.
  
  
  Non-Existent Class/Interface: The class or interface you are trying to reference may not exist in the system or may not be activated.
  
  
  Typographical Errors: There may be a typo in the class or interface name, leading to the system being unable to find it.
  
  
  Namespace Issues: If you are using a custom namespace, ensure that it is correctly defined and that the class or interface is within that namespace.
  
  
  Transport Issues: If the class or interface was recently transported from another system, it may not have been properly imported or activated.
  
  
  Solutions:
  
  
  Check Naming Conventions: Ensure that the class or interface name follows SAP's naming conventions. It should start with a letter and can include letters, numbers, and underscores.
  
  
  Verify Existence: Check if the class or interface exists in the system. You can do this by navigating to the ABAP Workbench (SE80) and searching for the class or interface.
  
  
  Correct Typos: Double-check the spelling of the class or interface name in your code to ensure there are no typographical errors.
  
  
  Namespace Verification: If you are using a custom namespace, ensure that the class or interface is defined within that namespace and that you are referencing it correctly.
  
  
  Activate the Object: If the class or interface exists but is not activated, activate it in the ABAP Workbench.
  
  
  Transport Check: If the class or interface was recently transported, ensure that the transport request was successfully imported and that the object is active.
  
  
  Related Information:
  
  ABAP Naming Conventions: Familiarize yourself with the naming conventions for classes and interfaces in ABAP to avoid similar issues in the future.
  Transaction Codes: Use transaction codes like SE80 (Object Navigator) or SE24 (Class Builder) to manage and check your classes and interfaces.
  Documentation: Refer to SAP documentation for more details on class and interface creation and management.
  
  If the issue persists after checking these aspects, consider reaching out to your SAP Basis or ABAP development team for further assistance.