Thanks for your report.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.
<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 5.10
Error message:
Range check error
Stack trace:
(003F0069) System::DynArraySetLength
(003F0069) System::DynArraySetLength
(003F0249) System::DynArraySetLength
(00790292) TParallelOperation::~TParallelOperation
(006DFD11) TTransferQueueItem::DoExecute
(006DF146) TQueueItem::Execute
(006DE17E) TTerminalItem::ProcessEvent
(006DC528) TSignalThread::Execute
(000A0BC7) Userinterface::C20_0
(00017742) KERNEL32.DLL.BaseThreadInitThunk
(0006487B) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00064848) ntdll.dll.RtlGetAppContainerNamedObjectPath
I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.