How to Fix ‘Outlook Out of Memory or System Resources’ Error?

Summary: The Outlook Out of Memory or System Resources error can occur due to different reasons. This blog explains the reasons for the Outlook Out of Memory error and shares some effective solutions to fix it. If your OST file becomes inaccessible or orphaned, you can use the advanced OST to PST converter tool mentioned in this blog.

Errors in Outlook occur when you least expect them. One common Outlook error that appears unexpectedly is the ‘Out of Memory or System Resources‘ error. The complete error message reads as:

“Out of memory or system resources. Close some windows or programs and try again.”

Out of memory or system resources. Close some windows or programs and try again.”

Here are a few variations of the error:

The error appears when your system runs short of memory resources to continue running processes or insufficient memory to display the folder. The error notification messages demand an immediate response and corrective action.

In this article, we will explore the common causes of this error and provide you with effective solutions to fix it.

Common Causes of ‘Out of Memory or System Resources’ Error

There can be several reasons that can lead to the ‘Out of Memory or System Resources‘ error in Microsoft Outlook 2007, 2010, 2013, 2016, 2019, and 2021. These include:

Solutions to Troubleshoot ‘Out of Memory or System Resources’ Error

Follow the below solutions and methods to fix the ‘Out of Memory or System Resources’ error in Microsoft Outlook, running on a Windows laptop or PC.

1. Check Resource Usage

To check the resource usage on your system, you can use the Task Manager. This can help you confirm whether you are indeed facing a memory or system resources issue. The steps are as follows:

Another way to check if there is a resource crunch on your system is to look for Outlook performance indicators. When your Outlook starts performing slow or sluggish while loading the client, sending or receiving new emails or search results, it means there is a resource crunch. If you frequently encounter Outlook freezing or crashing, it is a visible indication of low memory availability or a large/oversized OST file.

Read More, The OST File Has Reached The Maximum Size

2. Restart and Update Outlook

To resolve the “Out of Memory or System Resources” error, it is advised to restart the Outlook application and update it to the latest version.

3. Optimize System Resources for Outlook

To maximize the performance of Outlook, follow these instructions:

Consider closing any unused programs or windows to conserve system resources. Adjust the virtual memory settings in your computer’s System Properties. For this,

4. Find and Remove Faulty Add-ins from Outlook

Outlook users may experience the ‘Out of Memory or System Resources’ error due to faulty or damaged third-party add-ins. To identify and manage these add-ins, you need to restart Outlook in safe mode and then deactivate all the add-ins. Next, you need to restart Outlook normally, activate each add-in at a time and observe Outlook for the error. If the error appears after activating the add-in, deactivate and remove that particular add-in to fix the error.

The steps to start Outlook in safe mode and disable add-ins are as follows:

5. Increase the Size of the Memory Heap

You can increase the size of the memory heap to fix the ‘Outlook Out of Memory or System Resources’ error. The steps are as follows:

  1. Close Outlook and press Windows + R, type regedit, and then select OK or hit Enter.
  2. Navigate to the following registry subkey:
    HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows Messaging Subsystem
  3. Note: Before editing, back up the registry keys. This will help restore registry keys.

  4. Click Edit > New and then choose DWORD Value.
  5. Type SharedMemMaxSize, and press Enter.
  6. Then, right-click on SharedMemMaxSize, choose Modify, and type 300000 in the value data box. Always use the default Base of Hexadecimal.
  7. Click OK and then navigate to the following registry subkey:

    HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows Messaging Subsystem/Applications/Outlook
  8. Again click Edit > New and choose DWORD Value.
  9. Type SharedMemMaxSize and then click Enter.
  10. Type 300000 value and click OK.
  11. Close the registry editor.
  12. Note: You can increase the values up to 0x800000, if these values do not help.

6. Rebuild the OST File

Integrity problems with the OST file are usually the cause of the issue. To address this problem, Microsoft provides a built-in utility within Outlook known as ScanPST.exe, located in Outlook’s installation folder.

However, when the damage to the OST file is extensive, this tool may not suffice. In such cases, it may be necessary to delete and recreate the OST file. To do so, follow these steps:

Conclusion

The ‘Out of Memory or System Resources’ error in Outlook leads to Outlook crash. However, you can follow the troubleshooting methods and solutions discussed in this blog to resolve the issue. If your OST file turns inaccessible or orphaned, you can use OST to PST converter tool, such as Stellar Converter for OST. It can extract your mail items from an inaccessible, orphaned, or inconsistent OST file and save them in PST file. You can then import this PST into your Outlook to restore the items.


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