How To Fix CL654 - Enter a class type or an object table

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 654

• Message text: Enter a class type or an object table

What causes this issue?

Before you can display an object list, you need to enter either a class
type or an object table.
If you enter a class type, the object list is generated for this
particular class type.
If you enter an object table, the list is generated for all the class
types that exist for this object.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Please enter a class type or an object table.
Make one or more of the following entries for the class:
Enter a range (for example, "class1" to "class20")
Enter a class number
Enter a character string that the class is to contain
(for example, "cl*").
If you want to display an object list for a class type or object type
across all classes, enter an asterisk ("*") in the class field. In this
case, the system may require some time to generate the list.
If you make no entry at all for the class, the system cannot find any
objects.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL654 - Enter a class type or an object table ?

  The SAP error message CL654, which states "Enter a class type or an object table," typically occurs in the context of working with class definitions or object-oriented programming in ABAP (Advanced Business Application Programming). This error indicates that the system expects you to specify a class type or an object table, but it has not been provided.
  Cause:
  
  Missing Input: The error usually arises when a required input field for class type or object table is left blank or is incorrectly filled.
  Incorrect Context: The operation you are trying to perform may not be valid in the current context, leading to the system expecting additional information.
  Configuration Issues: There may be issues with the configuration of the class or object table in the system.
  
  Solution:
  
  Check Input Fields: Ensure that you have filled in all required fields correctly. Specifically, look for fields related to class type or object table and make sure they are not empty.
  Review Documentation: Consult the SAP documentation or help files related to the specific transaction or function you are using to understand the expected inputs.
  Use Correct Class Type: If you are working with class definitions, ensure that you are using the correct class type (e.g., local class, global class, interface).
  Debugging: If you are a developer, consider using the debugger to trace where the error is occurring and check the values being passed to the function or method.
  Consult with Colleagues: If you are unsure about the correct class type or object table to use, consult with colleagues or SAP experts within your organization.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Transaction Codes: Familiarize yourself with relevant transaction codes that deal with class definitions, such as SE24 (Class Builder) or SE80 (Object Navigator).
  ABAP Documentation: Review ABAP programming guidelines and best practices, especially those related to object-oriented programming.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support or your internal IT support team for further assistance.