How To Fix OO194 - The prefix "CX_" is reserved for exception classes

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 194

• Message text: The prefix "CX_" is reserved for exception classes

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message OO194 - The prefix "CX_" is reserved for exception classes ?

  The SAP error message OO194, which states "The prefix 'CX' is reserved for exception classes," typically occurs when you are trying to create a class in ABAP (Advanced Business Application Programming) that uses the prefix "CX" for its name. In ABAP, the prefix "CX_" is reserved for standard exception classes, and using it for user-defined classes can lead to conflicts and confusion.
  Cause:
  The error is caused by attempting to define a class with a name that starts with "CX_". For example, if you try to create a class named CX_MyException, you will encounter this error because it violates the naming convention established by SAP.
  Solution:
  To resolve this error, you should rename your class to avoid using the "CX_" prefix. Here are some steps you can follow:
  
  
  Choose a Different Prefix: Use a different prefix for your custom exception classes. Common practices include using prefixes like Z_ or Y_, which are typically used for custom developments in SAP.
  For example, instead of CX_MyException, you could name your class ZCX_MyException.
  
  
  Update References: If you have already created references to the class in your code, make sure to update those references to match the new class name.
  
  
  Check Naming Conventions: Familiarize yourself with SAP's naming conventions for classes and other objects to avoid similar issues in the future.
  
  
  Related Information:
  
  ABAP Naming Conventions: SAP has specific naming conventions for various objects in ABAP. Custom objects typically use the prefixes Z_ or Y_ to distinguish them from standard SAP objects.
  Exception Handling in ABAP: Exception classes in ABAP are used to handle errors and exceptional situations. They are defined with the prefix "CX_" and are part of the object-oriented programming model in ABAP.
  Documentation: Refer to the official SAP documentation for more details on exception handling and naming conventions in ABAP.
  
  By following these guidelines, you should be able to resolve the OO194 error and create your custom exception classes without any issues.