How To Fix SLEI_DEF_MSG129 - Read-only mode as system is in upgrade/maintenance mode

SAP Error Message - Details

• Message type: E = Error

• Message class: SLEI_DEF_MSG - Message class for LEI design time linkages

• Message number: 129

• Message text: Read-only mode as system is in upgrade/maintenance mode

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SLEI_DEF_MSG129 - Read-only mode as system is in upgrade/maintenance mode ?

  The SAP error message SLEI_DEF_MSG129 indicates that the system is currently in a read-only mode because it is undergoing an upgrade or maintenance. This means that certain operations, particularly those that require write access to the database, are restricted to ensure data integrity during the upgrade or maintenance process.
  Cause:
  
  System Upgrade: The SAP system is being upgraded to a newer version, which requires the database to be locked for write operations.
  Maintenance Activities: Scheduled maintenance tasks, such as applying patches or performing system checks, can also put the system into read-only mode.
  Configuration Settings: The system may have been explicitly set to read-only mode by an administrator for specific maintenance tasks.
  
  Solution:
  
  Wait for Completion: The simplest solution is to wait until the upgrade or maintenance process is completed. Once the process is finished, the system will automatically return to normal operation mode.
  Check Status: If you have access, check the status of the upgrade or maintenance process. You can do this through the SAP GUI or by consulting with your system administrator.
  Contact Administrator: If you believe the system should not be in read-only mode, contact your SAP Basis administrator or support team to verify the status and get an estimated time for completion.
  Review Logs: If you have access, review the upgrade or maintenance logs to identify any issues that may be causing delays.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to your specific version and the upgrade process for any known issues or additional guidance.
  System Documentation: Refer to the documentation for the specific upgrade or maintenance activities being performed for any additional steps or considerations.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have experienced similar issues.
  
  Preventive Measures:
  
  Schedule Downtime: Plan upgrades and maintenance during off-peak hours to minimize disruption.
  Communicate: Inform users in advance about scheduled maintenance to set expectations regarding system availability.
  Backup: Always ensure that backups are taken before performing upgrades or maintenance to prevent data loss.
  
  By following these steps, you can effectively manage the situation when encountering the SLEI_DEF_MSG129 error in SAP.