How To Fix B1684 - Synchronize table buffer in server & after the conversion

SAP Error Message - Details

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 684

• Message text: Synchronize table buffer in server & after the conversion

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message B1684 - Synchronize table buffer in server & after the conversion ?

  The SAP error message B1684, which states "Synchronize table buffer in server," typically occurs when there is a discrepancy between the table buffer in the application server and the database. This can happen after a database conversion or when changes are made to the table structure, such as adding or modifying fields.
  Cause:
  
  Table Structure Changes: If the structure of a table has been modified (e.g., fields added or removed), the buffer may not reflect these changes.
  Database Conversion: After a database conversion, the table buffers may not be synchronized with the new database schema.
  Buffer Inconsistencies: If there are inconsistencies in the buffer due to system errors or improper shutdowns, this error can occur.
  
  Solution:
  To resolve the B1684 error, you can follow these steps:
  
  
  Synchronize the Table Buffer:
  
  Use transaction code SE14 (Database Utility) to synchronize the table buffer.
  Select the relevant table and choose the option to "Synchronize Buffer."
  This will refresh the buffer and ensure it matches the current database structure.
  
  
  
  Check Table Buffer Settings:
  
  Ensure that the table is set to be buffered if it is supposed to be. You can check this in the Data Dictionary (SE11) under the table's technical settings.
  
  
  
  Clear the Buffer:
  
  If synchronization does not resolve the issue, you may need to clear the buffer. This can be done using transaction code SM12 to delete any locks and then using SM21 to check the system log for any related errors.
  
  
  
  Restart the Application Server:
  
  In some cases, restarting the application server can help clear any inconsistencies in the buffer.
  
  
  
  Check for Notes and Patches:
  
  Check the SAP Support Portal for any relevant notes or patches that may address this specific error, especially if it occurred after a system upgrade or conversion.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SE14: Database Utility for table synchronization.
  SE11: Data Dictionary for checking table settings.
  SM12: To manage locks.
  SM21: To view system logs.
  
  
  
  SAP Notes: Always check for SAP Notes related to your specific version of SAP, as there may be known issues or fixes available.
  
  
  Documentation: Refer to SAP Help documentation for more details on table buffering and database utilities.
  
  
  If the problem persists after trying these solutions, it may be necessary to consult with your SAP Basis team or reach out to SAP support for further assistance.