<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 6.5.6

Error message:
Invalid access to memory.

Stack trace:
(00DF4224) TSynchronizeChecklistDialog::AddSubItem
(00EF78FE)
(00EF9976)
(00EF6720) __ExceptionHandler
(00099A1F) ntdll.dll
(00078491) ntdll.dll.KiUserExceptionDispatcher
(00DF4567) TSynchronizeChecklistDialog::LoadItem

(00EF7F69)
(00EF949C)
(00BFA3E3) RethrowException
(00DF307F) TSynchronizeChecklistDialog::Execute
(00DF19EA) DoSynchronizeChecklistDialog
(00022D33) TCustomScpExplorerForm::DoFullSynchronizeDirectories
(00121EB8) FullSynchronize
(0012A0E2) Execute
(000033BB) wWinMain
(00EF5641) C7146_0
(0006B3A9) ntdll.dll
(0006B32A) ntdll.dll

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.