How To Fix CL603 - Select a class

CL603 - Overview

• Message type: E = Error

• Message class: CL - Classification

• Message number: 603

• Message text: Select a class

What causes this issue?

You have requested a list of classes, but have not entered any criteria
for selecting the class number.

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?

Enter a class number or a range of class numbers.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL603 - Select a class ?

  The SAP error message CL603 ("Select a class") typically occurs when you are trying to perform an action related to class management in the ABAP Workbench, but you have not selected a class or the system cannot find the specified class.
  
  Cause:
  
  No Class Selected: The most common cause is that the user has not selected any class in the relevant screen or dialog.
  Class Does Not Exist: The class you are trying to access may not exist in the system or may have been deleted.
  Authorization Issues: The user may not have the necessary authorizations to view or select the class.
  Incorrect Input: If you are trying to input a class name manually, there may be a typo or formatting issue.
  
  
  Solution:
  
  Select a Class: Ensure that you have selected a class from the list or entered a valid class name in the appropriate field.
  Check Class Existence: Use transaction code SE24 (Class Builder) to check if