How To Fix MW398 - Alloc tbl header already exists in function group buffer

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 398

• Message text: Alloc tbl header already exists in function group buffer

System Response

INCLUDE ISR_VERARBEITUNG

How to fix this error?

INCLUDE ISR_SYSTEMFEHLER OBJECT DOKU ID TX

Procedure for System Administrators

You attempted to create an allocation table header, although one
already exists in the global buffer of the function group. The global
buffer of the function group must first be initialized using the
REFRESH module.
This is a program error.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MW398 - Alloc tbl header already exists in function group buffer ?

  The SAP error message MW398: Alloc tbl header already exists in function group buffer typically occurs in the context of material management and inventory management within SAP. This error indicates that there is an issue with the allocation table header in the function group buffer, which can be related to various factors such as data inconsistencies, configuration issues, or problems with the underlying database.
  Causes:
  
  Data Inconsistency: There may be inconsistencies in the data related to the allocation tables, which can lead to conflicts when trying to access or modify them.
  Buffer Issues: The function group buffer may have stale or corrupted data, causing the system to believe that the allocation table header already exists when it does not.
  Configuration Errors: Incorrect configuration settings in the material management module can lead to this error.
  Concurrent Processing: If multiple processes are trying to access or modify the same allocation table simultaneously, it can lead to conflicts.
  
  Solutions:
  
  Clear Buffer: You can try to clear the function group buffer. This can be done using transaction code SM12 to delete any locks that may be causing the issue, and SM21 to check the system log for any related errors.
  Check Data Consistency: Use transaction SE11 to check the database table for inconsistencies. You may need to run consistency checks or repair tools if inconsistencies are found.
  Review Configuration: Check the configuration settings in the material management module to ensure that they are set up correctly. This may involve reviewing settings related to allocation tables and inventory management.
  Restart the Application: Sometimes, simply restarting the application or the SAP instance can resolve temporary issues related to the buffer.
  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 available that can resolve the issue.
  Contact SAP Support: If the issue persists after trying the above solutions, it may be necessary to contact SAP Support for further assistance. They can provide more in-depth troubleshooting and guidance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SM12 (Lock Entries), SM21 (System Log), and SE80 (Object Navigator) for debugging and analysis.
  SAP Notes: Regularly check for updates and notes related to your specific SAP version, as issues and solutions can vary between versions.
  Documentation: Review SAP documentation related to material management and inventory management for best practices and configuration guidelines.
  
  By following these steps, you should be able to diagnose and resolve the MW398 error in your SAP system.