Hi, I have a file .sdlxliff gave to me by a translator in Semplified Chinese (from US english). It's created with Trados Studio 2019.

I can open this file and I have no error.

When I export it in XLIFF, no error.

BUT I cannot more open XLIFF in Trados. I get error "Riferimento a un oggetto non impostato su un'istanza di oggetto." and cannot re open it. 

Also when my client try to import in his application, he have error too.

This is detailed error log:

<SDLErrorDetails time="09/07/2019 11.42.19">
<ErrorMessage>Riferimento a un oggetto non impostato su un'istanza di oggetto.</ErrorMessage>
<Exception>
<Type>System.NullReferenceException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
<HelpLink />
<Source>Sdl.FileTypeSupport.Filters.Xliff</Source>
<HResult>-2147467261</HResult>
<StackTrace><![CDATA[ in Sdl.FileTypeSupport.Filters.Xliff.Infrastructure.ParagraphUnitBuilder.AssignContext(IContextProperties context)
in Sdl.FileTypeSupport.Filters.Xliff.Infrastructure.ContextBuilder.AssignContextToParagraphUnitBuilder()
in Sdl.FileTypeSupport.Filters.Xliff.Infrastructure.Consumers.Parser.DocumentStructureForTranslationUnitElementConsumer.Consume(XmlNodeParsed message)
in lambda_method(Closure , IMessage )
in Sdl.FileTypeSupport.Filters.Xliff.Infrastructure.InMemoryBus.Publish(IMessage message)
in Sdl.FileTypeSupport.Filters.Xliff.ParserImpl.Publish(XmlNodeParsed message)
in Sdl.FileTypeSupport.Filters.Xliff.Infrastructure.XmlParser.Parse(XmlTextReader reader)
in Sdl.FileTypeSupport.Filters.Xliff.ParserImpl.Parse(String xliffPath)
in Sdl.FileTypeSupport.Filters.Xliff.Parser.ParseNext()
in Sdl.FileTypeSupport.Framework.Integration.FileExtractor.ParseNext()
in Sdl.FileTypeSupport.Framework.Integration.MultiFileConverter.ParseNext()
in Sdl.FileTypeSupport.Framework.Integration.MultiFileConverter.Parse()
in Sdl.TranslationStudio.Editor.TranslationEditor.TranslatableDocument.Load(IJobExecutionContext context)
in Sdl.Desktop.Platform.Services.JobRequest.Execute(IJobExecutionContext context)
in Sdl.Desktop.Platform.Implementation.Services.Job.<_worker_DoWork>b__47_0()
in Sdl.Desktop.Logger.Log.Resources(Object message, Action action)
in Sdl.Desktop.Platform.Implementation.Services.Job._worker_DoWork(Object sender, DoWorkEventArgs e)
in System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
in System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)]]></StackTrace>
</Exception>
<Environment>
<ProductName>SDL Trados Studio</ProductName>
<ProductVersion>15.0.0.0</ProductVersion>
<EntryAssemblyFileVersion>15.1.0.44109</EntryAssemblyFileVersion>
<OperatingSystem>Microsoft Windows 10 Pro</OperatingSystem>
<ServicePack>NULL</ServicePack>
<OperatingSystemLanguage>1040</OperatingSystemLanguage>
<CodePage>1252</CodePage>
<LoggedOnUser>XXXXX</LoggedOnUser>
<DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>
<ComputerName>XXXXX</ComputerName>
<ConnectedToNetwork>True</ConnectedToNetwork>
<PhysicalMemory>2096672 MB</PhysicalMemory>
</Environment>
</SDLErrorDetails>

Any Idea?