How To Fix CH166 - Error allocating memory (&)

SAP Error Message - Details

• Message type: E = Error

• Message class: CH - CAD/PP integration messages

• Message number: 166

• Message text: Error allocating memory (&)

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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Smart SAP Assistant

• What is the cause and solution for SAP error message CH166 - Error allocating memory (&) ?

  The SAP error message CH166, which indicates "Error allocating memory," typically occurs when the SAP system is unable to allocate the required memory for a process or operation. This can happen for various reasons, including insufficient memory resources, configuration issues, or limitations in the underlying operating system.
  Causes of CH166 Error
  
  
  Insufficient Memory: The most common cause is that the system does not have enough physical or virtual memory available to fulfill the request.
  
  
  Memory Configuration: The SAP memory parameters (like abap/heap_area_dia, abap/heap_area_nondia, etc.) may not be configured correctly, leading to memory allocation issues.
  
  
  Operating System Limits: The operating system may impose limits on memory usage for processes, which can lead to allocation failures.
  
  
  Memory Leaks: If there are memory leaks in the application or in custom code, it can lead to exhaustion of available memory over time.
  
  
  High Load: A sudden spike in load or concurrent users can lead to temporary memory shortages.
  
  
  Solutions to CH166 Error
  
  
  Check Memory Usage: Monitor the memory usage of the SAP system using transaction codes like SM04 (User Overview) and SM50 (Process Overview) to identify any processes consuming excessive memory.
  
  
  Adjust Memory Parameters: Review and adjust the SAP memory parameters in the instance profile. You can use transaction RZ10 to modify the instance profile and increase the relevant memory parameters.
  
  
  Increase Physical Memory: If the server is running low on physical memory, consider adding more RAM to the server.
  
  
  Review Operating System Settings: Check the operating system settings for any limits on memory allocation for processes. For example, on Unix/Linux systems, you may need to adjust the ulimit settings.
  
  
  Analyze Custom Code: If the error occurs in a specific transaction or program, review the custom code for potential memory leaks or inefficient memory usage.
  
  
  Restart the Instance: In some cases, restarting the SAP instance can temporarily resolve memory allocation issues.
  
  
  Check for Updates: Ensure that your SAP system is up to date with the latest patches and updates, as these may contain fixes for known memory-related issues.
  
  
  Related Information
  
  SAP Notes: Check SAP Notes related to memory allocation issues. You can search for specific notes using the SAP Support Portal.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  System Monitoring Tools: Utilize SAP's monitoring tools (like Solution Manager) to keep track of system performance and memory usage over time.
  
  If the problem persists after trying the above solutions, it may be necessary to engage SAP support for further assistance.