How To Fix ESH_RUBU_MSG021 - No active version of the shared objects instance available (MEM_MAIN)

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_RUBU_MSG - ESH RuBu - Messages

• Message number: 021

• Message text: No active version of the shared objects instance available (MEM_MAIN)

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 ESH_RUBU_MSG021 - No active version of the shared objects instance available (MEM_MAIN) ?

  The SAP error message ESH_RUBU_MSG021 indicates that there is no active version of the shared objects instance available for the specified memory area (in this case, MEM_MAIN). This error typically occurs in the context of SAP's Enterprise Search or the SAP NetWeaver platform, where shared objects are used for caching and performance optimization.
  Cause:
  
  Inactive Shared Objects Instance: The most common cause is that the shared objects instance has not been activated or has been deactivated.
  Configuration Issues: There may be configuration issues in the system that prevent the shared objects from being properly initialized or activated.
  Memory Management Issues: Problems with memory allocation or management can lead to the unavailability of the shared objects instance.
  System Errors: Other underlying system errors or inconsistencies may also lead to this issue.
  
  Solution:
  
  
  Activate the Shared Objects Instance:
  
  Go to the transaction code /IWFND/MAINT_SERVICE or /IWFND/ERROR_LOG to check the status of the shared objects instance.
  If it is inactive, activate it.
  
  
  
  Check Configuration:
  
  Review the configuration settings for the shared objects in the relevant SAP application or service.
  Ensure that all necessary parameters are correctly set.
  
  
  
  Restart the Application:
  
  Sometimes, simply restarting the application or the relevant service can resolve the issue.
  
  
  
  Check Memory Settings:
  
  Review the memory settings in the SAP system to ensure that there is sufficient memory allocated for shared objects.
  You can check the memory settings in the SAP profile parameters.
  
  
  
  System Logs:
  
  Check the system logs (transaction SM21) for any related errors or warnings that might provide additional context for the issue.
  
  
  
  SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message or provide patches or updates.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM21 (System Log), ST22 (Dump Analysis), and SM37 (Job Monitoring) to diagnose issues.
  SAP Documentation: Review the official SAP documentation for Enterprise Search and shared objects for more detailed information on configuration and troubleshooting.
  Performance Monitoring: Regularly monitor the performance of your SAP system to identify potential issues before they lead to errors.
  
  By following these steps, you should be able to diagnose and resolve the issue related to the ESH_RUBU_MSG021 error message.