How To Fix /SCMB/MD_LOCK100 - Lock server system error

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCMB/MD_LOCK -

• Message number: 100

• Message text: Lock server system 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 /SCMB/MD_LOCK100 - Lock server system error ?

  The SAP error message /SCMB/MD_LOCK100 typically indicates a problem related to the lock server in the SAP system, particularly in the context of the Supply Chain Management (SCM) module. This error usually arises when there are issues with locking mechanisms that are used to manage concurrent access to data in the system.
  Cause:
  
  Lock Table Overflow: The lock table may be full, which means that there are too many locks being held, and new requests cannot be processed.
  Network Issues: There may be network connectivity problems between the application server and the lock server.
  Lock Server Down: The lock server may be down or not functioning properly.
  Configuration Issues: There may be misconfigurations in the system settings related to the lock server.
  Long-Running Transactions: Long-running transactions may hold locks for an extended period, preventing new locks from being acquired.
  
  Solution:
  
  Check Lock Table: Use transaction code SM12 to check for existing locks. You can delete unnecessary locks if they are no longer needed.
  Monitor Lock Server: Use transaction code SM66 or SM50 to monitor the status of the lock server and see if it is functioning correctly.
  Restart Lock Server: If the lock server is down, you may need to restart it. This usually requires administrative access.
  Increase Lock Table Size: If the lock table is frequently full, consider increasing its size in the system configuration.
  Review Long Transactions: Identify and optimize long-running transactions that may be holding locks for too long.
  Check Network Connectivity: Ensure that there are no network issues affecting communication between the application server and the lock server.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to /SCMB/MD_LOCK100 for any specific patches or updates that may address the issue.
  System Logs: Review system logs (transaction SM21) for any related error messages that could provide more context.
  Performance Monitoring: Regularly monitor system performance and lock usage to prevent future occurrences of this error.
  Documentation: Refer to SAP documentation for best practices on managing locks and transactions in the SCM module.
  
  If the issue persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.