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 vote

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.



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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