How To Fix RT556 - SAP buffer: table definition (TableDefintion)

SAP Error Message - Details

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 556

• Message text: SAP buffer: table definition (TableDefintion)

What causes this issue?

The TableDefinition buffer (also known as the TTAB buffer) contains
Table definitions from the SAP Repository. These are stored in the table
DDNTT.
You can set the maximum number of entries in the buffer directory using
system parameter <ZH>rsdb/ntab/entrycount</>. The system then calculates
the maximum size of the TableDefinition-Puffer from this maximum number
of entries.
The maximum number of entries in the other SAP Repository buffers is set
by the system to twice the size of the maximum number of entries in the
TableDefinition buffer.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

INCLUDE BC_BUFFER_INFO1 OBJECT DOKU ID TX LANGUAGE EN
A typical size for the number of entries is around 30.000.
INCLUDE BC_BUFFER_INFO2 OBJECT DOKU ID TX LANGUAGE EN

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RT556 - SAP buffer: table definition (TableDefintion) ?

  The SAP error message RT556, which pertains to the SAP buffer and specifically to the table definition (TableDefinition), typically indicates an issue with the buffer management in the SAP system. This error can arise due to various reasons, including inconsistencies in the buffer, changes in the database schema, or issues with the transport of table definitions.
  Cause:
  
  Inconsistent Buffer: The buffer may not be in sync with the database due to changes in the table structure or data dictionary.
  Transport Issues: If a transport request containing changes to table definitions was not imported correctly, it could lead to inconsistencies.
  Database Changes: Changes made directly in the database (outside of SAP) can lead to discrepancies in the buffer.
  System Upgrade: After an upgrade, the buffer may need to be refreshed to reflect the new table definitions.
  
  Solution:
  
  Refresh the Buffer: You can refresh the buffer to ensure that it is in sync with the database. This can be done using transaction code SM12 to delete any locks and then using SM30 or SE11 to access the table and refresh the buffer.
  Check Transport Logs: Review the transport logs to ensure that all changes were imported correctly. If there are issues, you may need to re-import the transport request.
  Database Consistency Check: Use transaction SE14 (Database Utility) to check the consistency of the database and the buffer. This can help identify any discrepancies.
  Rebuild the Buffer: In some cases, you may need to rebuild the buffer. This can be done by using transaction RZ10 to adjust the profile parameters related to the buffer.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error. SAP frequently releases notes that provide solutions or workarounds for known issues.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE14 (Database Utility), SM12 (Lock Entries), and RZ10 (Profile Maintenance).
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, especially if it is affecting system performance or functionality.
  Documentation: Review SAP documentation and community forums for additional insights and user experiences related to this error.
  
  By following these steps, you should be able to diagnose and resolve the RT556 error in your SAP system.