How To Fix M3021 - A system error has occurred while locking

M3021 - Overview

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 021

• Message text: A system error has occurred while locking

What causes this issue?

A serious system error has occurred.

How to fix this error?

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Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M3021 - A system error has occurred while locking ?

  The SAP error message M3021, which states "A system error has occurred while locking," typically indicates that there is an issue with the system's ability to lock a resource or object during a transaction. This can happen for various reasons, including database issues, system configuration problems, or issues with the application itself.
  Causes:
  
  Database Lock Issues: The database may be unable to acquire a lock due to contention with other transactions or processes.
  System Configuration: Incorrect configuration settings in the SAP system or database can lead to locking issues.
  Network Problems: Network interruptions or issues can cause communication problems between the application server and the database.
  Resource Limitations: Insufficient system resources (like memory or CPU) can lead to failures in acquiring locks.
  Transport Issues: If the error occurs during a transport process, it may be due to issues with the transport directory or transport management system.
  Program Errors: Bugs or errors in custom ABAP programs or standard