How To Fix VIRT399 - *300-399 reserved for z/OS*

SAP Error Message - Details

• Message type: E = Error

• Message class: VIRT - Virtualization Monitoring

• Message number: 399

• Message text: *300-399 reserved for z/OS*

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.

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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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message VIRT399 - *300-399 reserved for z/OS* ?

  The SAP error message VIRT399 with the description "300-399 reserved for z/OS" typically indicates that there is an issue related to the virtual memory management in an SAP system running on a z/OS platform. This error is often associated with the allocation of virtual memory and can occur when the system attempts to access memory addresses that are reserved or not available for use.
  Cause:
  
  Memory Allocation Issues: The error may arise when the SAP system tries to allocate memory in the range of 300-399, which is reserved for z/OS system use.
  Configuration Errors: Incorrect configuration settings in the SAP system or the underlying z/OS environment can lead to this error.
  Resource Limitations: The system may be running low on available virtual memory, leading to allocation failures.
  
  Solution:
  
  Check Memory Configuration: Review the memory configuration settings in both the SAP system and the z/OS environment. Ensure that the memory allocation parameters are set correctly and that they do not conflict with reserved memory ranges.
  Adjust Resource Limits: If the system is running low on virtual memory, consider increasing the available memory resources. This may involve adjusting system parameters or adding more physical memory to the server.
  Review SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or patches that address this specific error. There may be updates or fixes available that can resolve the issue.
  Consult Documentation: Refer to the SAP and z/OS documentation for guidelines on memory management and configuration best practices.
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. They can provide more specific guidance based on your system configuration and logs.
  
  Related Information:
  
  SAP Notes: Always check for the latest SAP Notes related to memory management and error handling for your specific version of SAP.
  z/OS Documentation: Familiarize yourself with z/OS memory management concepts, as understanding how z/OS handles memory can help in troubleshooting.
  System Logs: Review system logs for additional error messages or warnings that may provide more context about the issue.
  
  By following these steps, you should be able to diagnose and resolve the VIRT399 error in your SAP system running on z/OS.