How To Fix 00178 - Logon refused (license key invalid)

00178 - Overview

• Message type: E = Error

• Message class: 00 -

• Message number: 178

• Message text: Logon refused (license key invalid)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

00178 - Details

• The SAP error message "00178 Logon refused (license key invalid)" indicates that the system is unable to validate the license key for the SAP installation. This can occur for several reasons, and here are the common causes, solutions, and related information:
  Causes:
  
  Expired License Key: The license key may have expired, which means the system can no longer accept logins.
  Incorrect License Key: The license key entered during installation or configuration may be incorrect or not matching the system's configuration.
  System Change: Changes in the system configuration (like hardware changes) can lead to an invalidation of the existing license key.
  License Key Not Installed: The license key may not have been installed properly or at all.
  Multiple Instances: If there are multiple instances of SAP running on the same server, there may be conflicts with the license keys.
  
  Solutions:
  
  Check License Key: Verify that the license key is correct and corresponds to the current system configuration. You can