How To Fix CL671 - Enter at least one letter in the name of your class type

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 671

• Message text: Enter at least one letter in the name of your class type

What causes this issue?

Class types that are created by customers must have at least one letter
in their name. Class types whose names contain only figures can only be
create in SAP's own systems with a special authorization.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL671 - Enter at least one letter in the name of your class type ?

  The SAP error message CL671, which states "Enter at least one letter in the name of your class type," typically occurs when you are trying to create or modify a class in the ABAP Workbench (transaction SE24) and you have not provided a valid name for the class type. This error is a validation check to ensure that the class name is not empty and meets the naming conventions required by SAP.
  Cause:
  
  Empty Class Name: You may have attempted to create a class without entering any name.
  Invalid Input: The input provided does not meet the naming conventions (e.g., it may contain invalid characters or be too short).
  User Interface Issue: Sometimes, the user interface may not have registered the input correctly due to a glitch.
  
  Solution:
  
  
  Enter a Valid Class Name: Ensure that you enter a valid name for your class. The name should:
  
  Start with a letter (A-Z or a-z).
  Be followed by letters, numbers (0-9), or underscores (_).
  Not exceed the maximum length allowed (typically 30 characters).
  Not contain special characters or spaces.
  
  
  
  Check for Leading/Trailing Spaces: Make sure there are no leading or trailing spaces in the class name input field.
  
  
  Refresh the Screen: If you suspect a user interface issue, try refreshing the screen or restarting the transaction.
  
  
  Consult Documentation: If you are unsure about the naming conventions, refer to the SAP documentation or guidelines for naming classes in ABAP.
  
  
  Check for System Issues: If the problem persists, it may be worth checking if there are any system issues or updates that need to be applied.
  
  
  Related Information:
  
  Naming Conventions: Familiarize yourself with the naming conventions for classes in ABAP to avoid similar issues in the future.
  Transaction SE24: This is the transaction code used to create and manage classes in SAP.
  SAP Community: If you continue to face issues, consider reaching out to the SAP Community or forums for additional support and insights from other users.
  
  By following these steps, you should be able to resolve the CL671 error and successfully create or modify your class in SAP.