How To Fix DNO157 - Installation number not known in the SAP customer notification system

DNO157 - Overview

• Message type: E = Error

• Message class: DNO - Messages for General Notifications

• Message number: 157

• Message text: Installation number not known in the SAP customer notification system

What causes this issue?

One of the following problems occurred:
You did not specify an installation number
The customer number you specified does not correspond to the
installation 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?

Check your entries and then save the notification again.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

DNO157 - Details

• The SAP error message DNO157, which states "Installation number not known," typically occurs in the context of the SAP Customer Notification System (CNS) when the system cannot find the specified installation number in the database. This can happen for several reasons, and here are some common causes, solutions, and related information:
  Causes:
  
  Incorrect Installation Number: The installation number entered may be incorrect or mistyped.
  Missing Installation Data: The installation number may not exist in the system, possibly due to data not being created or deleted.
  Authorization Issues: The user may not have the necessary authorizations to view or access the installation data.
  Data Synchronization Issues: There may be issues with data synchronization between different systems or modules within SAP.
  
  Configuration Issues: The configuration settings for the Customer Notification System may not be set up correctly.
  
  Solutions:
  
  Verify Installation Number: Double-check the installation number for accuracy. Ensure that it is entered correctly without any typos.
  Check Installation Data: Use transaction