How To Fix /SAPAPO/ND402 - Error during reservation of memory space

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/ND -

• Message number: 402

• Message text: Error during reservation of memory space

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 /SAPAPO/ND402 - Error during reservation of memory space ?

  The SAP error message /SAPAPO/ND402 Error during reservation of memory space typically occurs in the context of SAP Advanced Planning and Optimization (APO) when the system is unable to allocate the necessary memory for processing a request. This can happen due to various reasons, including insufficient memory allocation settings, system resource limitations, or configuration issues.
  Causes:
  
  Insufficient Memory Allocation: The SAP system may not have enough memory allocated to handle the current workload.
  System Resource Limitations: The underlying operating system or hardware may have limitations on memory usage.
  Configuration Issues: Incorrect settings in the SAP system configuration can lead to memory allocation problems.
  High Load: A sudden spike in demand or a large volume of data being processed can exhaust available memory.
  Memory Leaks: Inefficient coding or processes that do not release memory can lead to exhaustion over time.
  
  Solutions:
  
  
  Increase Memory Allocation:
  
  Check and increase the memory settings in the SAP profile parameters (e.g., abap/heap_area_total, abap/heap_area_dia, abap/heap_area_nondia).
  Adjust the instance profile settings to allocate more memory to the application server.
  
  
  
  Monitor System Resources:
  
  Use transaction codes like SM50 or SM66 to monitor the workload and see if any processes are consuming excessive memory.
  Check the operating system's memory usage to ensure that the server has enough physical memory available.
  
  
  
  Optimize Processes:
  
  Review and optimize any custom ABAP programs or processes that may be consuming excessive memory.
  Consider breaking down large data processing tasks into smaller batches to reduce memory consumption.
  
  
  
  Check for Memory Leaks:
  
  Analyze the system for any potential memory leaks in custom code or third-party add-ons.
  Use tools like the SAP Memory Inspector to identify and resolve memory leaks.
  
  
  
  System Upgrade:
  
  If the hardware is outdated, consider upgrading the server to provide more memory resources.
  Ensure that the SAP system is running on a supported version and that all relevant patches are applied.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to memory allocation in your version of SAP APO.
  
  
  
  Related Information:
  
  Transaction Codes: Use ST02 (Tune Summary) to check for memory-related issues and SM21 (System Log) to look for any related error messages.
  SAP Documentation: Refer to the official SAP Help Portal for detailed information on memory management and configuration settings.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation and assistance.