How To Fix PAK623 - Invalid class name: &1

SAP Error Message - Details

• Message type: E = Error

• Message class: PAK - Package API / Package Tools

• Message number: 623

• Message text: Invalid class name: &1

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 PAK623 - Invalid class name: &1 ?

  The SAP error message PAK623, which states "Invalid class name: &1," typically occurs in the context of the SAP Product Lifecycle Management (PLM) or SAP Advanced Planning and Optimization (APO) modules. This error indicates that the system has encountered a class name that is not recognized or is invalid.
  Cause:
  
  Typographical Error: The class name specified may contain a typo or incorrect formatting.
  Non-Existent Class: The class name may not exist in the system or may have been deleted.
  Authorization Issues: The user may not have the necessary authorizations to access the specified class.
  Configuration Issues: There may be issues with the configuration of the class or its associated objects.
  Transport Issues: If the class was recently transported from another system, it may not have been transported correctly.
  
  Solution:
  
  Check Class Name: Verify that the class name entered is correct and follows the naming conventions used in SAP.
  Class Existence: Use transaction codes like CL02 (Change Class) or CL03 (Display Class) to check if the class exists in the system.
  Authorization Check: Ensure that the user has the necessary authorizations to access the class. This can be checked with the help of a security administrator.
  Configuration Review: Review the configuration settings related to the class to ensure they are set up correctly.
  Transport Validation: If the class was transported, check the transport logs to ensure that the transport was successful and that all necessary objects were included.
  Consult Documentation: Refer to SAP documentation or help resources for additional guidance on class naming conventions and usage.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CL01, CL02, CL03, and SE11 (Data Dictionary) for further investigation.
  Debugging: If you have access, consider debugging the program or transaction that triggered the error to identify the exact point of failure.
  
  If the issue persists after following these steps, it may be beneficial to reach out to SAP support for further assistance.