Hi Stefano,

I've just checked and I can also reproduce this behaviour.

It happens when one clicks 'next' on the language selection page even if you don't select an extra language to those that are already in place as in the project the new project is based on.
I uninstalled CCleaner just in case you're right about it. The problem still occurred.
I remove CCleaner once I've used it then install the newest version next time.

All the best,
Ali

PS Stacktrace:

<?xml version="1.0"?>
<SDLErrorDetails time="09/05/2017 16:39:45">
<ErrorMessage>Object reference not set to an instance of an object.</ErrorMessage>
<Exception>
<Type>System.NullReferenceException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
<HelpLink/>
<Source>Sdl.TranslationStudio.ProjectManagement</Source>
<HResult>-2147467261</HResult>
<StackTrace>
<![CDATA[
at Sdl.TranslationStudio.ProjectManagement.ProjectWizard.ProjectLanguagesWizardPage.CopyAllLanguageDirectionSettingsFromTemplate()
at Sdl.TranslationStudio.ProjectManagement.ProjectWizard.ProjectLanguagesWizardPage.UpdateProjectLanguages(Boolean validate)
at Sdl.TranslationStudio.ProjectManagement.ProjectWizard.ProjectLanguagesWizardPage.OnNext()
at Sdl.Desktop.Platform.Wizard.AbstractWizard`1.Next()
at Sdl.Desktop.Platform.Wizard.AbstractWizard`1._form_Next(Object sender, CancelEventArgs e)
at Sdl.Desktop.Platform.WinForms.WizardForm._nextButton_Click(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
]]>
</StackTrace>
</Exception>
<Environment>
<ProductName>SDL Trados Studio</ProductName>
<ProductVersion>14.0.0.0</ProductVersion>
<EntryAssemblyFileVersion>14.0.5889.5</EntryAssemblyFileVersion>
<OperatingSystem>Microsoft Windows 10 Pro</OperatingSystem>
<ServicePack>NULL</ServicePack>
<OperatingSystemLanguage>2057</OperatingSystemLanguage>
<CodePage>1252</CodePage>
<LoggedOnUser>FUJITSUP5925\Alison</LoggedOnUser>
<DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>
<ComputerName>FUJITSUP5925</ComputerName>
<ConnectedToNetwork>True</ConnectedToNetwork>
<PhysicalMemory>8091948 MB</PhysicalMemory>
</Environment>
</SDLErrorDetails>

Hi Stefano and Alison,

Please follow the below resolution from the article: gateway.sdl.com/.../communityknowledge

Solution:

Create a template of the project the new project is supposed to be based on and use this.

1. In the Projects view right click on the projects name, you wish to base your new project on and select Create Project Template

2.After having saved the project template create a new project via

File > New > Project

3. In the New Project Wizard select Create a project based on project template

4.Choose the template you have saved in step 2, either from the drop down menu, or by clicking on Browse and selecting the template

5.Click Next

6.Proceed normally from here on.

Thanks

Roman