How To Fix K6384 - There are no free check tables (or all are blocked)

SAP Error Message - Details

• Message type: E = Error

• Message class: K6 - EC-EIS/EC-BP data basis: Data entry and collection

• Message number: 384

• Message text: There are no free check tables (or all are blocked)

What causes this issue?

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

All generated check table are already used in characteristics or are
blocked.

System Response

How to fix this error?

Try to assign the check tables manually (save and select 'manually' in
the following dialog box). Then see the check tables that are not used
yet.
If no push-buttons can be seen here, then all available check tables
are already being used. In this case, delete characteristics with
generated check tables, that you no longer use. Where necessary, when
recreating assign SAP standard tables to these characteristics
(transfer table fields or assign data element/domain). Then no check
table will be generated.
If push-buttons can still be seen then these check tables are blocked
at the moment. When pressing the check table number key a message
appears explaining which user is blocking the tables.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message K6384 - There are no free check tables (or all are blocked) ?

  The SAP error message K6384, which states "There are no free check tables (or all are blocked)," typically occurs in the context of the Controlling (CO) module when the system is unable to find available check tables for a particular operation. This can happen during various processes, such as when trying to post a transaction or when running reports that require access to check tables.
  Causes:
  
  Exhausted Check Tables: All available check tables have been used up, meaning that there are no free entries left for new transactions.
  Blocked Check Tables: Some check tables may be blocked due to ongoing processes or transactions that have not been completed or released.
  Configuration Issues: There may be configuration issues in the system that prevent the proper allocation of check tables.
  Database Issues: Problems with the underlying database, such as corruption or locking issues, can also lead to this error.
  
  Solutions:
  
  Check Table Status: Use transaction code KAH1 to check the status of the check tables. Ensure that there are free entries available.
  Release Blocked Tables: If tables are blocked, identify the transactions or processes that are causing the blockage and resolve them. This may involve completing or reversing transactions.
  Increase Check Table Capacity: If the check tables are exhausted, consider increasing their capacity. This may involve adjusting configuration settings or database parameters.
  Database Maintenance: Perform database maintenance tasks to ensure that the database is functioning correctly. This may include checking for locks, running consistency checks, or optimizing the database.
  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, consider reaching out to SAP Support for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as KAH1 (Check Table Overview) and KAH2 (Check Table Maintenance).
  System Logs: Review system logs (transaction code SM21) for any additional error messages or warnings that may provide more context about the issue.
  User Authorizations: Ensure that the user has the necessary authorizations to access and modify check tables.
  
  By following these steps, you should be able to diagnose and resolve the K6384 error in SAP.