How To Fix G3545 - No lock mode entries are available

SAP Error Message - Details

• Message type: E = Error

• Message class: G3 - Messages for SAP Consolidation: Integration

• Message number: 545

• Message text: No lock mode entries are available

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message G3545 - No lock mode entries are available ?

  The SAP error message G3545 "No lock mode entries are available" typically occurs when there is an issue with the lock management in the SAP system. This error can arise in various scenarios, often related to the handling of database locks, which are used to ensure data consistency during transactions.
  Cause:
  
  Lock Table Overflow: The most common cause of this error is that the lock table has reached its maximum capacity. This can happen if there are too many concurrent transactions trying to acquire locks, or if locks are not being released properly.
  Configuration Issues: Incorrect configuration settings for lock management in the SAP system can also lead to this error.
  Long-Running Transactions: If there are long-running transactions that hold locks for an extended period, it can exhaust the available lock entries.
  System Performance Issues: Performance problems in the database or application server can lead to delays in releasing locks, causing the lock table to fill up.
  
  Solution:
  
  Check Lock Table Size: Increase the size of the lock table if it is consistently reaching its limit. This can be done by adjusting the parameters in the SAP system configuration (e.g., enque/table_size).
  Monitor and Optimize Transactions: Identify long-running transactions and optimize them to ensure they complete in a timely manner. This may involve reviewing the code or processes involved.
  Release Unused Locks: Use transaction codes like SM12 to monitor and manually release any unnecessary locks that may be held by users or processes.
  Review Configuration: Check the configuration settings related to lock management in the SAP system and adjust them as necessary.
  System Performance Tuning: Investigate and resolve any underlying performance issues in the database or application server that may be contributing to the problem.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM21: To check system logs for any related errors or warnings.
  ST22: To analyze dumps that may provide insights into the issue.
  
  
  SAP Notes: Check for relevant SAP Notes that may provide additional guidance or patches related to lock management issues.
  Documentation: Review SAP documentation on lock management and performance tuning for best practices.
  
  If the problem persists after trying the above solutions, it may be necessary to consult with SAP support or a technical consultant who can provide deeper insights into the specific configuration and performance of your SAP system.