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SourceTree does not start anymore (Null pointer)

SourceTree does not start anymore.

I redownloaded the newest version from the website, but it suffers the same problem.

The log file says:

ERROR [2017-09-28 09:56:32,317] [1] [SourceTree.App] [.ctor] - finish EnsureSquirrelExecutionStubIsCopied
ERROR [2017-09-28 09:56:32,443] [1] [SourceTree.App] [OnStartup] - Failed to start
System.NullReferenceException: Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.
   bei SourceTree.Notifications.NotificationsManager.SetOwner(NotificationDialogWindow notificationWindow)
   bei SourceTree.Notifications.NotificationsManager.ShowNotificationDialog[T](NotificationDialogWindow notificationWindow, Tuple`2 customAction, VistaTaskDialogIcon icon)
   bei SourceTree.Notifications.NotificationsManager.ShowNotificationDialog[T](String title, String message, Tuple`2 customAction, String cancelLabel, String suppressionSetting, Action`1 suppressionChangedAction, Object contentControl, String contentCommandLabel, Action contentAction)
   bei SourceTree.Notifications.NotificationsManager.ShowNotificationDialogWithYesConfirmation(String title, String message, String details)
   bei SourceTree.Configuration.WpfSpellCheckerPreFlightCheck.Run()
   bei SourceTree.AppRoot.RunPreFlightChecks()
   bei SourceTree.AppRoot.OnStartup(StartupEventArgs e)
   bei SourceTree.App.OnStartup(StartupEventArgs e)

1 answer

0 votes
Ana Retamal Atlassian Team Oct 02, 2017

Hi Marc, this is a known issue, they were talking about it on this thread. To solve it, navigate to the config file location (C:\Users\{USERNAME}\AppData\Local\Atlassian\SourceTree.exe_{RANDOM_GUID}\\user.config) and find the following line:

<setting name="AutomaticallyCleanUpDictionaryFiles" serializeAs="String"> <value>True</value> </setting>

Make sure that value is set to True.

Let us know if it worked for you!

Cheers :)


Hi Ana,

thanks for the pointer!

This setting was not specified in the configuration file at all, hence the NullReferenceException. Maybe a default value should be used in this case :)

Well, I can confirm that after adding this setting, the NullReferenceException no longer occurs and SourceTree starts successfully again.



Ana Retamal Atlassian Team Oct 02, 2017

I'm glad to hear that, Marc! Have a nice day :D


I had the same Issue. After adding the missing setting in the config file, SourceTree started as usual! Thank's

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