How To Fix SL203 - System log number must begin with a letter

SAP Error Message - Details

• Message type: E = Error

• Message class: SL - System log

• Message number: 203

• Message text: System log number must begin with a letter

What causes this issue?

Unpermitted data.

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?

The system log message ID is three characters long.
An uppercase letter A..Z
An uppercase letter A..Z or a number 0..9
An uppercase letter A..Z or a number 0..9

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SL203 - System log number must begin with a letter ?

  The SAP error message SL203, which states "System log number must begin with a letter," typically occurs when there is an issue with the format of the system log number being entered in the SAP system. This error is often encountered in transactions or processes where a log number is required, such as in the context of logging system events or errors.
  Cause:
  The primary cause of this error is that the system log number you are trying to enter does not conform to the expected format. Specifically, the log number must start with a letter (A-Z) followed by alphanumeric characters. If the log number starts with a digit or contains invalid characters, the system will reject it and display this error message.
  Solution:
  To resolve the SL203 error, follow these steps:
  
  
  Check the Log Number Format: Ensure that the log number you are entering starts with a letter. For example, valid log numbers could be "A123", "B456", etc.
  
  
  Correct the Input: If the log number you are trying to enter starts with a digit or contains invalid characters, modify it to meet the required format.
  
  
  Consult Documentation: If you are unsure about the valid format for the log number, refer to the SAP documentation or guidelines specific to the transaction or process you are working with.
  
  
  Test the Entry: After correcting the log number, try to enter it again in the system to see if the error persists.
  
  
  Check for Customizations: If your organization has customized the SAP system, there may be specific rules or formats for log numbers. Consult with your SAP administrator or technical team for any custom requirements.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message. SAP frequently releases notes that address specific error messages and provide additional context or solutions.
  Transaction Codes: The error may occur in various transaction codes, so understanding the context in which you are encountering the error can help in troubleshooting.
  User Permissions: Ensure that you have the necessary permissions to enter or modify system log numbers, as restrictions may also lead to errors.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team for further assistance.