Hi, I've found this error several times here in the forum, but never when "converting to translatable format". Any idea?

Is it possible, that these ENTITY lines create the problem?

<SDLErrorDetails time="1/13/2026 1:16:20 PM">
  <ErrorMessage>Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index</ErrorMessage>
  <Exception>
    <Type>System.ArgumentOutOfRangeException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
    <ExceptionMessage>Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index</ExceptionMessage>
    <ParamName>index</ParamName>
    <HelpLink />
    <Source>mscorlib</Source>
    <HResult>-2146233086</HResult>
    <StackTrace><![CDATA[   at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
   at Sdl.FileTypeSupport.Filters.Xml.Core.Parser.DocTypeConsumer.ExtractEntityMappings(List`1 dtdNodes)
   at Sdl.FileTypeSupport.Filters.Xml.Core.Parser.DocTypeConsumer.Consume(XmlNodeMessage`1 message)
   at Sdl.FileTypeSupport.Filters.Xml.Core.Messaging.Consumer`1.TryConsume(IMessage message)
   at Sdl.FileTypeSupport.Filters.Xml.Core.Messaging.InMemoryMessageBus.Publish(IMessage message)
   at Sdl.FileTypeSupport.Filters.Xml.Core.Messaging.MessagePublisher.PublishXmlNodeMessage[T](T node)
   at Sdl.FileTypeSupport.Filters.Xml.Core.XmlNodes.XmlNodesDispatcher.ReadAndDispatchNodes()
   at Sdl.FileTypeSupport.Filters.Xml.XmlParser.ReadAndDispatchXmlNodes(Stream inputStream, Encoding fileEncoding)
   at Sdl.FileTypeSupport.Filters.Xml.XmlParser.ParseNext()
   at Sdl.FileTypeSupport.Framework.Integration.FileExtractor.ParseNext()
   at Sdl.FileTypeSupport.Framework.Integration.MultiFileConverter.ParseNext()
   at Sdl.FileTypeSupport.Framework.Integration.MultiFileConverter.Parse()
   at Sdl.ProjectApi.AutomaticTasks.Conversion.ConversionTask.ProcessFile(IExecutingTaskFile executingTaskFile)
   at Sdl.ProjectApi.AutomaticTasks.AbstractFileLevelAutomaticTaskImplementation.Execute()]]></StackTrace>
  </Exception>
  <Environment>
    <ProductName>Trados Studio</ProductName>
    <ProductVersion>Studio18</ProductVersion>
    <EntryAssemblyFileVersion>18.1.3.6657</EntryAssemblyFileVersion>
    <OperatingSystem>Microsoft Windows 11 Pro</OperatingSystem>
    <ServicePack>NULL</ServicePack>
    <OperatingSystemLanguage>1031</OperatingSystemLanguage>
    <CodePage>1252</CodePage>
    <LoggedOnUser>BURIM\bbekt</LoggedOnUser>
    <DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>
    <ComputerName>BURIM</ComputerName>
    <ConnectedToNetwork>True</ConnectedToNetwork>
    <PhysicalMemory>16458476 MB</PhysicalMemory>
  </Environment>
</SDLErrorDetails>

Thnx a lot!