Microsoft Outlook Application Crash due to UCRTBASE.DLL

Anonymous
2020-12-07T17:43:25+00:00

Windows 10 Build 2004

Outlook crashes intermittently and generates the following Application Event Log error.

Event 1000, Application Error (11:06AM, 12/7/2020) Faulting application name: OUTLOOK.EXE, version: 16.0.13426.20308, time stamp: 0x5fc6ea9b Faulting module name: ucrtbase.dll, version: 10.0.19041.546, time stamp: 0x73123758 Exception code: 0xc0000409 Fault offset: 0x0009edbb Faulting process id: 0x41c0 Faulting application start time: 0x01d6ccaedccaa9fa Faulting application path: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Faulting module path: C:\WINDOWS\System32\ucrtbase.dll Report Id: f8791f7b-faf7-452a-8ff2-7268662a6db2 Faulting package full name: Faulting package-relative application ID:

I have run SFC /SCANNOW

I have completely uninstalled and reinstalled Microsoft Office 365

Here are the properties of the failing file:

Windows for home | Windows 10 | Performance and system failures

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  1. Anonymous
    2020-12-07T21:01:34+00:00

    Hi, I'm Elise, an independent advisor and I'd be happy to help with your issue.

    Could you try open Outlook in safe mode, it is possible an add-in is causing the issue.

    Right-click the Start button, and click Run.

    Type Outlook.exe /safe, and click OK.

    Please let me know if you need any further assistance.

    Kind Regards,

    Elise

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  2. Anonymous
    2020-12-09T17:17:31+00:00

    Hello Elise,

      Starting in Safe mode appears to have worked.  I am listing the Add-ins that were originally enabled below.  I currently have Outlook running with only the Microsoft Exchange Add-in, but was wondering if you had any idea which of the Add-ins below might be the most likely culprit?  Or conversely, which ones are known safe Add-ins so I can narrow down which one might be causing this error.

    Sharefile Outlook Plug-in

    Microsoft VBA for Outlook Addin

    Microsoft SharePoint Server Colleague Import Add-in

    Microsoft Exchange Add-in

    OneNote Notes about Outlook Items

    Acrobat PDFMaker Office COM Addin

    Kerry.

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  3. Anonymous
    2020-12-09T17:23:03+00:00

    I would suspect the Acrobat add-in but I would suggest disabling each in turn to check.

    Kind Regards,

    Elise

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  4. Anonymous
    2020-12-09T21:40:26+00:00

    Elise,

    We are experiencing the same issue (versions, faulting application, faulting module, exception code, etc.) and starting Outlook in Safe Mode does not prevent it from crashing.

    What I've noticed so far is that the crash occurs when replying to emails. The crash can happen while typing/composing or when the user clicks Send. So far, I've only tried rolling back to previous Windows build because 10+ users have this issue and there were updates installed recently.

    Thank you.

    Chris

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  5. Anonymous
    2021-01-04T15:52:48+00:00

    Disabling the Add-ins did not help.  I eventually called Microsoft Office 365 Support and we had to create a whole new Windows 10 profile for the user.  It has been two business days and so far no crashes while sending emails.  Hopefully this will be helpful for others who may be having this issue.

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