2026-10-20 16:07:06.9311 2356 An error occurred that caused the worker to close. System.NullReferenceException: 未将对象引用设置到对象的实例。
   at ReturnCode NTwain.Triplets.PendingXfers.EndXfer(TWPendingXfers pendingXfers)
   at void NTwain.Internals.TransferLogic.DoTransferRoutine(ITwainSessionInternal session)
   at void NTwain.TwainSession.HandleSourceMsg(Message msg)
   at ReturnCode NTwain.TwainSession.HandleCallback(TWIdentity origin, TWIdentity destination, DataGroups dg, DataArgumentType dat, Message msg, IntPtr data)+() => { } [1]
   at void NTwain.MessageLoopHook.BeginInvoke(Action action)+(object o) => { }
2026-10-20 16:12:52.7937 9664 An error occurred that caused the worker to close. System.NullReferenceException: 未将对象引用设置到对象的实例。
   at ReturnCode NTwain.Triplets.PendingXfers.EndXfer(TWPendingXfers pendingXfers)
   at void NTwain.Internals.TransferLogic.DoTransferRoutine(ITwainSessionInternal session)
   at void NTwain.TwainSession.HandleSourceMsg(Message msg)
   at ReturnCode NTwain.TwainSession.HandleCallback(TWIdentity origin, TWIdentity destination, DataGroups dg, DataArgumentType dat, Message msg, IntPtr data)+() => { } [1]
   at void NTwain.MessageLoopHook.BeginInvoke(Action action)+(object o) => { }
