How To Fix AQ498 - Structure change in logical database (use Help)

SAP Error Message - Details

• Message type: E = Error

• Message class: AQ - Message texts for SAP Query

• Message number: 498

• Message text: Structure change in logical database (use Help)

What causes this issue?

The logical database used to create the InfoSet has been changed and is
incompatible. Tables have been deleted from the tree. Since the fields
of these tables are not used in queries, they have been deleted from
the InfoSet. The structure of the tree has also been changed.
Therefore, queries using this InfoSet may not work correctly.

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 and modify the InfoSet. Then, you must check and, if necessary,
correct all the queries which use this InfoSet.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AQ498 - Structure change in logical database (use Help) ?

  The SAP error message AQ498, which states "Structure change in logical database (use Help)," typically occurs when there is a mismatch between the structure of the logical database and the program or report that is trying to access it. This can happen due to various reasons, such as changes in the underlying data model, updates to the database structure, or modifications in the program itself.
  Cause:
  
  Database Structure Changes: Changes in the underlying database tables or structures that the logical database relies on.
  Program Modifications: If the program or report has been modified without corresponding updates to the logical database.
  Transport Issues: If the logical database was transported to a different system without the necessary adjustments.
  Version Mismatch: Running a program that was developed in a different version of SAP where the logical database structure was different.
  
  Solution:
  
  Check for Updates: Ensure that the logical database is up to date with the latest changes in the database structure. This may involve checking for any recent changes in the data model.
  Rebuild the Logical Database: If you have access, you can try to regenerate or rebuild the logical database to ensure it aligns with the current database structure.
  Review Program Code: Check the program or report code for any inconsistencies or outdated references to the logical database.
  Use SAP Help: The error message suggests using the SAP Help documentation. You can access the SAP Help Portal or the specific transaction code related to the logical database to get more detailed information on the structure and any changes that may have occurred.
  Consult with Basis Team: If you are unable to resolve the issue, it may be beneficial to consult with your SAP Basis team or a technical consultant who can analyze the system and provide insights.
  
  Related Information:
  
  Transaction Codes: You may want to look into transaction codes like SE11 (Data Dictionary) or SE37 (Function Modules) to investigate the logical database and its structure.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide patches related to the logical database in question.
  Documentation: Review the documentation for the specific logical database you are using to understand its structure and any dependencies.
  
  If the issue persists after trying the above solutions, it may be necessary to escalate the problem to SAP support for further assistance.