How To Fix UAS400 - Shared memory object &1, instance &2 was not generated

SAP Error Message - Details

• Message type: E = Error

• Message class: UAS -

• Message number: 400

• Message text: Shared memory object &1, instance &2 was not generated

What causes this issue?

Shared memory generation error.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Call transaction SHMA and invalidate shared memory object &1, instance
&2 in the shared memory monitor. The data basis will then use formulas
from the XML file.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UAS400 - Shared memory object &1, instance &2 was not generated ?

  The SAP error message "UAS400 Shared memory object &1, instance &2 was not generated" typically indicates an issue with the shared memory object that is required for certain SAP processes. This error can occur in various scenarios, often related to the configuration or operation of the SAP system.
  Cause:
  
  Configuration Issues: The shared memory object may not be properly configured in the SAP system.
  Memory Allocation Problems: There may be insufficient memory allocated to the SAP instance, preventing the shared memory object from being created.
  System Resource Limitations: The operating system or database may have limitations on shared memory usage that are being exceeded.
  Corrupted Memory Objects: Previous instances of the shared memory object may be corrupted or improperly released.
  SAP Kernel Issues: There may be bugs or issues in the SAP kernel that affect the creation of shared memory objects.
  
  Solution:
  
  Check Configuration: Review the configuration settings for shared memory in the SAP system. Ensure that the parameters are set correctly.
  Increase Memory Allocation: If memory allocation is insufficient, consider increasing the shared memory settings in the SAP profile parameters (e.g., shmmax, shmall on Unix/Linux systems).
  Clear Memory Objects: If there are corrupted memory objects, you may need to clear them. This can often be done by restarting the SAP instance.
  Check System Limits: Verify the operating system's shared memory limits. On Unix/Linux systems, you can check and modify these limits using commands like ipcs and sysctl.
  Update SAP Kernel: Ensure that you are using the latest version of the SAP kernel. If not, consider applying the latest patches or updates.
  Review Logs: Check the SAP system logs (e.g., dev_w* files) for additional error messages or warnings that may provide more context about the issue.
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Documentation: Review the official SAP documentation for your specific version and module to understand the requirements and limitations regarding shared memory.
  
  If the issue persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.