42045 - &1 : Enqueue error

SAP Error Message - Details

• Message type: E = Error

• Message class: 42 - Information Workbench

• Message number: 045

• Message text: &1 : Enqueue error

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message 42045 - &1 : Enqueue error ?

  The SAP error message "42045 &1: Enqueue error" typically indicates that there is an issue with the enqueue mechanism in SAP, which is responsible for managing locks on objects to ensure data consistency during concurrent access. This error can occur for various reasons, and understanding the cause is essential for finding a solution.
  Causes of Enqueue Error 42045
  
  
  Lock Conflicts: Another user or process may have a lock on the object you are trying to access, preventing your transaction from acquiring the necessary lock.
  
  
  System Resource Issues: The enqueue server may be experiencing resource constraints, such as memory or CPU limitations, which can lead to failures in acquiring locks.
  
  
  Network Issues: If there are network problems between the application server and the enqueue server, it may result in an inability to communicate effectively, leading to enqueue errors.
  
  
  Database Issues: Problems with the underlying database, such as deadlocks or other locking issues, can also manifest as enqueue errors in SAP.
  
  
  Configuration Issues: Incorrect configuration of the SAP system or the enqueue server can lead to errors in lock management.
  
  
  Solutions to Enqueue Error 42045
  
  
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. If you find locks that are no longer needed, you can delete them (if you have the necessary authorizations).
  
  
  Review System Resources: Monitor the system resources (CPU, memory, etc.) on the application and enqueue servers. If resources are low, consider optimizing performance or scaling up the infrastructure.
  
  
  Check Network Connectivity: Ensure that there are no network issues between the application server and the enqueue server. You can use tools like ping or traceroute to diagnose connectivity problems.
  
  
  Analyze Database Locks: Use transaction code SM21 to check the system log for any database-related issues. You may also want to check for deadlocks in the database.
  
  
  Restart Enqueue Server: If the enqueue server is unresponsive or malfunctioning, restarting it may resolve the issue. However, this should be done with caution and preferably during a maintenance window.
  
  
  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 problem persists and you cannot identify the cause, consider reaching out to SAP Support for further assistance.
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM21: System log for monitoring system messages.
  SM37: Job monitoring, which can help identify if background jobs are causing locks.
  
  
  
  Documentation: Review SAP documentation related to enqueue management and locking mechanisms for a deeper understanding of how locks are handled in the system.
  
  
  Performance Monitoring: Regularly monitor system performance and lock management to proactively identify and resolve potential issues before they lead to errors.
  
  
  By following these steps, you should be able to diagnose and resolve the enqueue error 42045 in your SAP system.