The error occurs when I have been connected to a remote host that becomes unavailable (rebooted or shut down) and the automatic reconnect dialog is "Searching for host..." Pressing the x to close the window triggers the error. It is intermittent, but when it occurs I have to use task manager to close the application.

WinSCP 5.13.5

Error message:
Invalid access to memory.

Stack trace:
(003F2A9F) System::DoneExcept
(0007DABF) ntdll.dll
(0006B6E1) ntdll.dll.KiUserExceptionDispatcher
(00380EE0) System::Classes::_18201
(0003AF19) USER32.dll
(000373E5) USER32.dll
(00036C99) USER32.dll
(00036A7B) USER32.dll.DispatchMessageW

(003F268C) System::HandleAnyException
(0007DABF) ntdll.dll
(0006B6E1) ntdll.dll.KiUserExceptionDispatcher
(00380EE0) System::Classes::_18201
(0003AF19) USER32.dll
(000373E5) USER32.dll
(00036C99) USER32.dll
(00036A7B) USER32.dll.DispatchMessageW

Status: all_insignificant

The problem happens rarely. I cannot reproduce it.