How To Fix AH379 - The last schema change could not be canceled

SAP Error Message - Details

• Message type: E = Error

• Message class: AH - IS-U billing (master data)

• Message number: 379

• Message text: The last schema change could not be canceled

What causes this issue?

You executed the <LS>Undo</> function during maintenance of the schema
steps. However, no change has been reversed.
Note the following:
You cannot reverse changes you made to the schema header data.
You can reverse changes to fields (if, for example, you selected a
field).
You can reverse the moving of lines or rates.
If you insert or delete rates, you cannot reverse these changes.
This message is also displayed if you have not yet carried out any
changes in the schema steps.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AH379 - The last schema change could not be canceled ?

  The SAP error message AH379, which states "The last schema change could not be canceled," typically occurs in the context of database schema changes in SAP systems. This error can arise during operations that involve modifying the database schema, such as adding or removing fields, changing data types, or other structural changes.
  Cause:
  
  Pending Changes: The error may occur if there are pending changes in the database schema that cannot be rolled back or canceled. This can happen if the system is in a state where it cannot revert to the previous schema due to dependencies or constraints.
  Locking Issues: If there are locks on the database objects that are being modified, it may prevent the cancellation of the schema change.
  Inconsistent State: The system might be in an inconsistent state due to a failed previous operation or an interrupted process.
  Transport Issues: If the schema change was part of a transport request that failed or was not properly imported, it could lead to this error.
  
  Solution:
  
  Check for Locks: Use transaction codes like SM12 to check for any locks on the database objects. If there are locks, you may need to release them or wait until they are cleared.
  Review Change Logs: Check the change logs or the transport logs to identify any issues with the last schema change. This can provide insights into what went wrong.
  Manual Rollback: If possible, manually revert the changes made by the last schema change. This may involve executing SQL commands or using SAP tools to restore the previous state.
  Database Consistency Check: Run consistency checks on the database to ensure that there are no inconsistencies that could be causing the issue.
  Restart the System: In some cases, restarting the SAP system can help clear temporary states or locks that are causing the error.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates that resolve known issues related to schema changes.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE14 (Database Utility), and SE80 (Object Navigator) for managing database objects and schema changes.
  SAP Basis Team: If you are not able to resolve the issue, it may be necessary to involve your SAP Basis team or database administrator, as they can provide deeper insights and access to system logs.
  Documentation: Review SAP documentation related to database management and schema changes for best practices and troubleshooting steps.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.