<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 6.5.3

Error message:
Accès mémoire invalide.

Trace de la pile :
(0013A958) System::UStrEqual
(000B320F) ntdll.dll
(0007A66A) ntdll.dll.KiUserExceptionDispatcher
(00BC60F2) IsRealFile
(00C4C3F1) IsUnixHiddenFile
(00419EC0) Vcl::Comctrls::TCustomListView::CNNotify
(004F3E76) Nortonlikelistview::TCustomNortonLikeListView::CNNotify
(0039E2AA) Vcl::Controls::TControl::WndProc
(003A3455) Vcl::Controls::TWinControl::WndProc
(0041AF67) Vcl::Comctrls::TCustomListView::WndProc
(003A35AF) Vcl::Controls::_17122
(003A3455) Vcl::Controls::TWinControl::WndProc
(003A2960) Vcl::Controls::TWinControl::MainWndProc
(00204B78) System::Classes::_18364
(00038A71) USER32.dll
(00026BE8) USER32.dll
(0002668B) USER32.dll
(00032EF7) USER32.dll
(0007A644) ntdll.dll.KiUserCallbackDispatcher
(0003F443) USER32.dll
(000263B1) USER32.dll.SendMessageW
(0009BB16) COMCTL32.DLL
(0009D683) COMCTL32.DLL
(0009DC1D) COMCTL32.DLL
(00092F33) COMCTL32.DLL
(000930A0) COMCTL32.DLL
(0009318C) COMCTL32.DLL
(00093207) COMCTL32.DLL
(000958DE) COMCTL32.DLL
(00094662) COMCTL32.DLL
(00038A71) USER32.dll
(00026BE8) USER32.dll
(00026355) USER32.dll.CallWindowProcW
(003A355D) Vcl::Controls::TWinControl::DefaultHandler
(003A80E7) Vcl::Controls::TWinControl::WMPrintClient
(0039E2AA) Vcl::Controls::TControl::WndProc
(003A3455) Vcl::Controls::TWinControl::WndProc
(0041AF67) Vcl::Comctrls::TCustomListView::WndProc
(003A3EB3) Vcl::Controls::TWinControl::WMPaint
(0041CE11) Vcl::Comctrls::TCustomListView::WMPaint
(003A3455) Vcl::Controls::TWinControl::WndProc
(0041AF67) Vcl::Comctrls::TCustomListView::WndProc
(00204B78) System::Classes::_18364
(00038A71) USER32.dll
(00026BE8) USER32.dll
(00026355) USER32.dll.CallWindowProcW
(000829E4) COMCTL32.DLL
(00082A83) COMCTL32.DLL
(000827FC) COMCTL32.DLL
(00038A71) USER32.dll
(00026BE8) USER32.dll
(00026355) USER32.dll.CallWindowProcW
(0053941F) Dragdrop::TDragDrop::WndMethod
(00204B78) System::Classes::_18364
(00038A71) USER32.dll
(00026BE8) USER32.dll
(0002668B) USER32.dll
(00032EF7) USER32.dll
(0007A644) ntdll.dll.KiUserCallbackDispatcher
(00025BDB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
Well, just tried to zip up a small text file to send for some debugging of a firewall issue...
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.9.2

Error message:
Invalid access to memory.

Stack trace:
(003E625C) System::UStrEqual
(00863846) C5073_3
(008658AE) ____ExceptionHandler
(00862668) __ExceptionHandler
(0003EE3E) ntdll.dll.ZwWow64CallFunction64
(0003F5BA) ntdll.dll.KiUserExceptionDispatcher
(006CE201) TRemoteFile::GetIsParentDirectory
(006D1A14) TRemoteFile::GetFullFileName
(007790C8) TTerminal::CalculateFileSize
(00776AF9) TTerminal::ProcessFiles
(00779526) TTerminal::CalculateFilesSize
(00785271) TTerminal::CopyToLocal
(0001156D) TCustomScpExplorerForm::TemporarilyDownloadFiles
(0000994E) TCustomScpExplorerForm::CustomCommand
(0000E6F1) TCustomScpExplorerForm::ExecuteFileOperation
(0000E91C) TCustomScpExplorerForm::ExecuteFileOperation
(0000E9A3) TCustomScpExplorerForm::ExecuteFileOperationCommand
(0003DAE4) TNonVisualDataModule::CustomCommandClick
(00372BEC) System::Classes::_18201
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(0000966A) USER32.DLL
(000096DB) USER32.DLL.DispatchMessageW

(003E625C) System::UStrEqual
(00863846) C5073_3
(008658AE) ____ExceptionHandler
(00862668) __ExceptionHandler
(0003EE3E) ntdll.dll.ZwWow64CallFunction64
(0003F5BA) ntdll.dll.KiUserExceptionDispatcher
(006CE201) TRemoteFile::GetIsParentDirectory
(006D1A14) TRemoteFile::GetFullFileName
(007790C8) TTerminal::CalculateFileSize
(00776AF9) TTerminal::ProcessFiles
(00779526) TTerminal::CalculateFilesSize
(00785271) TTerminal::CopyToLocal
(0001156D) TCustomScpExplorerForm::TemporarilyDownloadFiles
(0000994E) TCustomS

The problem happens rarely. I cannot reproduce it.

<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 5.9

Error message:
Invalid access to memory.

Stack trace:
(003E5CA4) System::UStrEqual
(0086216E) C5073_3
(008641D6) ____ExceptionHandler
(00860F90) __ExceptionHandler
(00062496) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(006CCF8D) TRemoteFile::GetIsParentDirectory
(006D045C) TRemoteFile::GetFullFileName
(00777A7C) TTerminal::CalculateFileSize
(007754AD) TTerminal::ProcessFiles
(00777EDA) TTerminal::CalculateFilesSize
(00783C25) TTerminal::CopyToLocal
(0000DD8A) TCustomScpExplorerForm::ExecuteFileOperation
(0000E9E4) TCustomScpExplorerForm::ExecuteFileOperation
(0000EA6B) TCustomScpExplorerForm::ExecuteFileOperationCommand
(0000EBF2) TCustomScpExplorerForm::ExecuteCopyOperationCommand
(00037546) TNonVisualDataModule::ExplorerActionsExecute
(003B4768) System::Actions::TContainedActionList::ExecuteAction
(0019B96D) Vcl::Actnlist::TCustomAction::Execute
(0037264C) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167CE) USER32.dll
(00016895) USER32.dll.DispatchMessageW

(003E5CA4) System::UStrEqual
(0086216E) C5073_3
(008641D6) ____ExceptionHandler
(00860F90) __ExceptionHandler
(00062496) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(006CCF8D) TRemoteFile::GetIsParentDirectory
(006D045C) TRemoteFile::GetFullFileName
(00777A7C) TTerminal::CalculateFileSize
(007754AD) TTerminal::ProcessFiles
(00777EDA) TTerminal::CalculateFilesSize
(00783C25) TTerminal::CopyToLocal
(0000DD8A) TCustomScpExplorerForm::ExecuteFileOpe

The problem happens rarely. I cannot reproduce it.