How To Fix D4406 - SAP/OS400 roll mgmt:Free user management - current number of big elements

SAP Error Message - Details

• Message type: E = Error

• Message class: D4 - DB2/400 specific messages

• Message number: 406

• Message text: SAP/OS400 roll mgmt:Free user management - current number of big elements

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message D4406 - SAP/OS400 roll mgmt:Free user management - current number of big elements ?

  The SAP error message D4406, which pertains to "SAP/OS400 roll management: Free user management - current number of big elements," typically indicates an issue related to memory management in the SAP system, particularly in the context of the OS/400 operating system. This error can occur when the system has reached its limit for the number of large memory elements (big elements) that can be allocated for user sessions.
  Cause:
  
  Memory Limitations: The system has a predefined limit on the number of large memory elements that can be allocated. If this limit is reached, new requests for memory allocation will fail, leading to the D4406 error.
  High User Load: A high number of concurrent users or processes may lead to excessive memory consumption, resulting in the exhaustion of available big elements.
  Configuration Issues: Incorrect configuration settings for memory management in the SAP system can also contribute to this error.
  
  Solution:
  
  
  Increase Memory Limits: 
  
  Review and, if necessary, increase the limits for memory allocation in the SAP system configuration. This may involve adjusting parameters related to roll area and memory management.
  Consult the SAP documentation or your system administrator for specific parameters that can be adjusted.
  
  
  
  Monitor User Sessions: 
  
  Use transaction codes like SM04 or AL08 to monitor active user sessions and identify any sessions that may be consuming excessive resources.
  Consider terminating idle or unnecessary sessions to free up memory.
  
  
  
  Optimize Memory Usage: 
  
  Review the applications and processes running on the system to identify any that may be using excessive memory. Optimize or refactor these processes if possible.
  Ensure that the system is regularly maintained and that any unnecessary background jobs or processes are stopped.
  
  
  
  System Restart: 
  
  In some cases, a system restart may help clear memory and reset the allocation of big elements. However, this should be done with caution and typically as a last resort.
  
  
  
  Consult SAP Support: 
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance. They may provide specific patches or updates that address memory management issues.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on memory management in SAP on OS/400.
  Documentation: Review the SAP Basis documentation for best practices on memory management and configuration settings.
  System Monitoring Tools: Utilize SAP monitoring tools to keep track of memory usage and user sessions, which can help in proactive management of system resources.
  
  By addressing the underlying causes and implementing the suggested solutions, you should be able to resolve the D4406 error and improve the overall performance of your SAP system.