How To Fix SHMA090 - This change invalidates all active area instances and locks

SAP Error Message - Details

• Message type: E = Error

• Message class: SHMA - Shared Objects: Management Messages

• Message number: 090

• Message text: This change invalidates all active area instances and locks

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 SHMA090 - This change invalidates all active area instances and locks ?

  The SAP error message SHMA090 typically indicates that a change made to a shared memory area (SMA) has invalidated all active area instances and locks associated with that area. This can occur in scenarios where the structure or configuration of the shared memory area is modified while it is still in use, leading to inconsistencies or conflicts.
  Cause:
  
  Modification of Shared Memory Area: The most common cause of this error is that a change was made to the shared memory area definition (e.g., adding or removing fields, changing data types) while there were still active instances or locks on that area.
  Concurrent Access: If multiple processes or transactions are trying to access or modify the shared memory area simultaneously, it can lead to this error.
  System Configuration Changes: Changes in system configuration or updates to the SAP system that affect shared memory management can also trigger this error.
  
  Solution:
  
  Restart the Application: If possible, restart the application or transaction that is using the shared memory area. This will clear any active instances and locks.
  Check for Active Instances: Use transaction codes like SM12 to check for locks and SM21 for system logs to identify any active instances that may be causing the issue.
  Review Changes: If you have recently made changes to the shared memory area, review those changes to ensure they are valid and do not conflict with existing instances.
  System Restart: In some cases, a system restart may be necessary to clear all active instances and locks.
  Consult Documentation: Refer to SAP documentation or notes related to shared memory management for specific guidance on handling this error.
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for assistance, especially if it is affecting production systems.
  
  Related Information:
  
  Shared Memory Management: Understanding how shared memory works in SAP can help prevent this error. Shared memory is used for efficient data storage and access across multiple processes.
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (to view and manage locks), SM21 (to view system logs), and SM37 (to monitor background jobs) for troubleshooting.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to resolve the SHMA090 error and prevent it from occurring in the future.