How To Fix IU674 - System & locked for all users apart from DDIC -> restart system

SAP Error Message - Details

• Message type: E = Error

• Message class: IU - Incremental Conversion (ICNV)

• Message number: 674

• Message text: System & locked for all users apart from DDIC -> restart system

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 IU674 - System & locked for all users apart from DDIC -> restart system ?

  The SAP error message IU674 indicates that the system is locked for all users except for the user DDIC (the Data Dictionary user). This situation typically arises when the system is in a state that requires administrative intervention, often due to maintenance activities, system upgrades, or other critical operations.
  Cause:
  
  System Maintenance: The system may be undergoing maintenance or updates, which can lock out all users except for the DDIC user.
  Database Lock: A database lock might have been placed on the system to prevent any changes while certain operations are being performed.
  System Configuration: Certain configurations or settings in the system may lead to a lockout scenario.
  Error During Operations: An error during a system operation (like a transport or upgrade) could lead to the system being locked.
  
  Solution:
  
  
  Restart the System: The immediate solution is to restart the SAP system. This can often clear temporary locks and restore normal access.
  
  Steps to Restart:
  
  Log in to the server where the SAP system is hosted.
  Use the appropriate commands to stop and then start the SAP instance. This can typically be done using the SAP Management Console (SAP MMC) or command line tools like sapcontrol.
  
  
  
  
  
  Check for Ongoing Processes: Before restarting, check if there are any ongoing processes that might be causing the lock. You can use transaction codes like SM50 or SM66 to monitor active processes.
  
  
  Review System Logs: After restarting, review the system logs (transaction SM21) to identify any errors or warnings that occurred before the lock. This can help in diagnosing the root cause.
  
  
  Check Database Locks: Use transaction code SM12 to check for any database locks that might be causing the issue. If there are locks that are no longer needed, they can be released.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific issue. There may be patches or updates that can resolve underlying problems.
  
  
  Contact SAP Support: If the issue persists after a restart and investigation, it may be necessary to contact SAP Support for further assistance.
  
  
  Related Information:
  
  User DDIC: The DDIC user is a special user in SAP that has full access to the system and is often used for administrative tasks. It is important to ensure that this user is not used for regular operations.
  System Locking Mechanisms: Understanding how SAP locks its systems can help in troubleshooting. Locks can be at the application level or database level.
  Preventive Measures: To avoid such situations in the future, ensure that proper maintenance windows are scheduled, and that users are informed of potential downtimes.
  
  By following these steps, you should be able to resolve the IU674 error and restore normal access to the SAP system.