How To Fix 00421 - Roll-free error

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 421

• Message text: Roll-free error

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 00421 - Roll-free error ?

  The SAP error message "00421 Roll-free error" typically indicates that there is an issue with the roll area in the SAP system. This error occurs when the system is unable to allocate memory for the roll area, which is used to store data for user sessions. Here are the causes, solutions, and related information for this error:
  Causes:
  
  Insufficient Memory: The roll area may not have enough memory allocated to handle the current workload or user sessions.
  Configuration Issues: Incorrect configuration settings in the SAP system related to memory management can lead to roll-free errors.
  High User Load: A sudden increase in the number of concurrent users or processes can exhaust the available roll area.
  System Resource Limits: Operating system-level limits on memory usage may restrict the SAP system's ability to allocate the necessary resources.
  
  Solutions:
  
  
  Increase Roll Area Size:
  
  Adjust the parameters for the roll area in the SAP profile. The parameters to look for include rdisp/roll_area and rdisp/roll_max_sess.
  You can do this by accessing the instance profile in transaction RZ10 and modifying the relevant parameters.
  
  
  
  Check Memory Configuration:
  
  Review the memory settings in the SAP system. Ensure that the total memory allocated to the SAP instance is sufficient for the expected workload.
  Use transaction RZ11 to check and modify profile parameters related to memory.
  
  
  
  Monitor User Sessions:
  
  Use transaction SM04 to monitor active user sessions and identify if there are any sessions that can be terminated to free up resources.
  Consider implementing session management practices to limit the number of concurrent sessions.
  
  
  
  System Resource Check:
  
  Check the operating system's memory usage and limits. Ensure that the server has enough physical memory and that there are no restrictions imposed by the OS.
  If necessary, consider upgrading the server hardware or optimizing other applications running on the same server.
  
  
  
  Restart the SAP Instance:
  
  In some cases, a simple restart of the SAP instance can help clear temporary issues and free up resources.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to roll area errors for specific patches or updates that may address known issues.
  SAP Community: Engage with the SAP Community forums for insights and solutions shared by other users who have encountered similar issues.
  System Monitoring: Implement regular monitoring of system performance and memory usage to proactively identify potential issues before they lead to roll-free errors.
  
  By addressing the underlying causes and implementing the suggested solutions, you can resolve the "00421 Roll-free error" and improve the stability of your SAP system.