How To Fix TG677 - Comparison between current release and Release 400 failed

TG677 - Overview

• Message type: E = Error

• Message class: TG - Messages for Upgrade Repository Switch

• Message number: 677

• Message text: Comparison between current release and Release 400 failed

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?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message TG677 - Comparison between current release and Release 400 failed ?

  The SAP error message TG677, which states "Comparison between current release and Release 400 failed," typically occurs during the upgrade or migration process of an SAP system. This error indicates that there is a mismatch or inconsistency between the current version of the SAP system and the version it is being compared to (in this case, Release 400).
  Causes:
  
  Version Mismatch: The system may be trying to compare data or configurations from an older version (Release 400) with the current version, and there are discrepancies that prevent a successful comparison.
  Inconsistent Data: There may be inconsistencies in the data or configurations that were carried over from the older version to the current version.
  Upgrade Issues: If the upgrade process was not completed successfully, it could lead to this error.
  Missing Objects: Certain objects or components that existed in Release 400 may not be present or have been modified in the current release.
  
  Solutions:
  
  Check Upgrade Logs: Review