<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
External exception EEFFACE

スタック トレース:
(0013C982) KERNELBASE.dll.RaiseException
(00087A7F) ntdll.dll
(000740D1) ntdll.dll.KiUserExceptionDispatcher
(005441B0) Jclhookexcept::_16408
(0100463E) C6083_0
(01005A2F) _ReThrowException
(00D1C282) TTerminalQueue::CreateStatus
(0000816D) TCustomScpExplorerForm::UpdateQueueStatus
(0001BA57) TCustomScpExplorerForm::Idle
(00053267) TNonVisualDataModule::DoIdle
(00053224) TNonVisualDataModule::SessionIdleTimerTimer
(0021564C) System::Classes::_18201
(0003FF49) USER32.dll
(00036EF5) USER32.dll
(00034C65) USER32.dll
(00034A2B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.