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Windows Live Mail (Win 7) error message: Assertion Failed

by Kondan1990 / March 1, 2011 3:32 AM PST

I need your help. I completed the upgrade installation of Win 7, and all updates including SP1, but every time I open Windows Live mail I get the following error message:

(I choose Ignore, and have no further problems until the next time I open Win Live Mail)

Assertion Failed: Abort = Quit, Retry = Debug, Ignore = Continue

Failed to initialize Shared Canvas: System.IO.fileNotFoundException:
Could not load file or asembly 'WindowsLive.Writer.Localization,
Version-15.4.3508.1109, Culture = neutral,
PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The
system cannot find the file specified.
File name: 'WindowsLive.Writer.Localization, Version = 15.4.3508.1109,
Culture = neutral, PublicKeyToken = 31bf3856ad364e35'
(Assembly rootAssembly, String installationDirectory, String
settingsRootKeyName, String productName)
WindowsLive.Writer.PostEditor.ContentEditorFactory.Initialize (String
RegistrySettingsPath, IcontentEditorLogger logger, IcontentTarget
ContentTarget, IsettingsProvider settingsProvider)

WRN: assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value
[HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly
bind failure logging.
To turn this feature off, remove the registry value

At ContentEditorFactory.Initialize(String registrySettingsPath,
IContentEditorLogger logger, IContentTarget contentTarget,
ISettingsProvider settingsProvider)

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Seems a missing file.
by Kees_B Forum moderator / March 1, 2011 3:54 AM PST

I'd start with uninstalling WLM and installing the latest version that you can download from


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Thanks for your help!
by Kondan1990 / March 1, 2011 11:38 AM PST
In reply to: Seems a missing file.

I re-installed WinLive mail over the existing one, and it repaired it!!! Thank you!! Happy

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At last a solution - for me.
by Frederik94 / August 23, 2012 10:22 AM PDT

At last a solution - for me.

I cannot believe this problem has been notified so many times and the experts are dumb-founded. It has plagued me for years. M$oft nor Facebook don't want to know.

I am no programmer or expert but this is what I found. The error appears to be in Boost C++ libraries (add-ons for C++ programming) that are not properly installed.

Probably installed by some software that needed them.

I can't find out how to repair/uninstall them but if they are reinstalled the problem goes away. Go to


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Thanks but...
by R. Proffitt Forum moderator / August 23, 2012 10:28 AM PDT

Thanks but the boost libraries are quite rare out there. Only those that write apps should encounter that issue. So unless the folk that have issues reveal what's different, this issue is not going to be guessed by experts.

Maybe if the expert had access to the PC but that is rare.

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