How To Fix LMON030 - Blocking of resource type(s) &2 &1

SAP Error Message - Details

• Message type: E = Error

• Message class: LMON - Monitor messages

• Message number: 030

• Message text: Blocking of resource type(s) &2 &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LMON030 - Blocking of resource type(s) &2 &1 ?

  The SAP error message LMON030 indicates that there is a blocking issue related to a specific resource type in the SAP system. This error typically occurs in the context of the SAP Logistics Management (LM) or when dealing with resource management in various SAP modules.
  Cause:
  The error message LMON030 is triggered when a resource (such as a lock, object, or data) is being accessed or modified by one process while another process is trying to access the same resource. This can happen due to:
  
  Concurrent Access: Multiple users or processes trying to access the same resource simultaneously.
  Long-running Transactions: A transaction that takes too long to complete, holding locks on resources longer than necessary.
  Deadlocks: Situations where two or more processes are waiting for each other to release resources, causing a standstill.
  Configuration Issues: Incorrect settings in the system that lead to resource contention.
  
  Solution:
  To resolve the LMON030 error, you can take the following steps:
  
  
  Identify the Blocking Process:
  
  Use transaction codes like SM12 (for lock entries) to identify which user or process is holding the lock on the resource.
  Check transaction SM21 for system logs that might provide additional context about the error.
  
  
  
  Terminate the Blocking Process:
  
  If it is safe to do so, you can terminate the blocking process using transaction SM37 (for job monitoring) or SM12 (for lock entries) to release the locks.
  
  
  
  Optimize Transactions:
  
  Review the transactions that are causing the locks. Optimize them to ensure they complete faster and release locks promptly.
  Consider breaking long-running transactions into smaller, more manageable ones.
  
  
  
  Adjust Configuration:
  
  Review and adjust any relevant configuration settings that may be contributing to resource contention.
  
  
  
  Monitor System Performance:
  
  Regularly monitor system performance and resource usage to identify potential bottlenecks before they lead to blocking issues.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12, SM21, SM37, and ST22 for monitoring locks, system logs, job statuses, and dumps, respectively.
  SAP Documentation: Refer to the official SAP documentation for detailed information on resource management and troubleshooting locking issues.
  SAP Community: Engage with the SAP Community forums for insights and solutions shared by other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and resolve the LMON030 error effectively.