How To Fix DNO005 - External notification number contains invalid characters

SAP Error Message - Details

• Message type: E = Error

• Message class: DNO - Messages for General Notifications

• Message number: 005

• Message text: External notification number contains invalid characters

What causes this issue?

You entered characters that are not permitted.

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?

Only the characters from "A" to "Z", from "0" to "9" , "-", and "/"
are permitted. Modify your entry accordingly.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DNO005 - External notification number contains invalid characters ?

  The SAP error message DNO005 indicates that the external notification number you are trying to use contains invalid characters. This error typically occurs in the context of notifications in SAP, particularly when dealing with external systems or interfaces that require specific formats for identifiers.
  Cause:
  The error is caused by the presence of characters in the external notification number that are not allowed according to the defined rules in the SAP system. Common causes include:
  
  Special characters (e.g., @, #, $, %, etc.)
  Spaces or leading/trailing spaces
  Non-alphanumeric characters
  Length of the notification number exceeding the allowed limit
  
  Solution:
  To resolve the DNO005 error, you can take the following steps:
  
  
  Check the Notification Number: Review the external notification number you are trying to enter. Ensure that it only contains valid characters, typically alphanumeric (A-Z, 0-9).
  
  
  Remove Invalid Characters: If you find any special characters or spaces, remove them. Ensure that the notification number adheres to the expected format.
  
  
  Verify Length: Ensure that the notification number does not exceed the maximum length defined in the system. If it does, truncate it to fit the allowed length.
  
  
  Consult Documentation: Check the relevant SAP documentation or configuration settings to understand the specific rules for external notification numbers in your system.
  
  
  Test with Valid Input: After making the necessary corrections, try to input the notification number again to see if the error persists.
  
  
  Check Custom Code or Enhancements: If you are using custom code or enhancements that manipulate notification numbers, review that code to ensure it is not introducing invalid characters.
  
  
  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 (e.g., IW21 for creating notifications) to better understand where the error occurs.
  User Exits and BAdIs: If your organization has implemented user exits or BAdIs that affect notification processing, review those for potential issues.
  
  If the problem persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.