Invalid access to memory

<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 5.7

Error message:
Invalid access to memory.

Stack trace:
(0073F06E) WinSCP.exe.[0074006E]
[010A05DE] C4725_0
[010A2646] ____ExceptionHandler
[0109F5C0] __ExceptionHandler
[7762023E] ntdll.dll.ZwWow64CallFunction64
[776209BA] ntdll.dll.KiUserExceptionDispatcher
[00F075A7] TFileOperationProgressType::DoProgress
[008CD30F] TCustomScpExplorerForm::ExecuteFileOperation
[008CDF18] TCustomScpExplorerForm::ExecuteFileOperation
[008CDF9F] TCustomScpExplorerForm::ExecuteFileOperationCommand
[008CE0D7] TCustomScpExplorerForm::ExecuteCopyOperationCommand
[008F2F3A] TNonVisualDataModule::ExplorerAction s E xecute
[00C42740] System::Actions::TContainedActionList::ExecuteAction
[00A2A2A1] Vcl::Actnlist::TCustomAction::Execute

(0073F06E) WinSCP.exe.[0074006E]
[7762023E] ntdll.dll.ZwWow64CallFunction64
[776209BA] ntdll.dll.KiUserExceptionDispatcher
[00F075A7] TFileOperationProgressType::DoProgress
[008CD30F] TCustomScpExplorerForm::ExecuteFileOperation
[008CDF18] TCustomScpExplorerForm::ExecuteFileOperation
[008CDF9F] TCustomScpExplorerForm::ExecuteFileOperationCommand
[008CE0D7] TCustomScpExplorerForm::ExecuteCopyOperationCommand
[008F2F3A] TNonVisualDataModule::ExplorerAction s E xecute
[00C42740] System::Actions::TContainedActionList::ExecuteAction
[00A2A2A1] Vcl::Actnlist::TCustomAction::Execute

Thanks for your report.
I have sent you an email with a debug version of WinSCP to 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 5.7.6

Error message:
Accesso alla memoria non valido.

Stack trace:
(492D02F8)WinSCP.exe
(0003EE3E) ntdll.dll.ZwWow64CallFunction64
(0003F5BA) ntdll.dll.KiUserExceptionDispatcher
(00648F67) TFileOperationProgressType::DoProgress
(00778DD0) TProgressForm::CancelButtonClick
(0021C315) Vcl::Controls::TWinControl::WndProc
(00184D80) Vcl::Stdctrls::TButtonControl::WndProc
(0021C47B) Vcl::Controls::_17076
(0021C315) Vcl::Controls::TWinControl::WndProc
(001D70B8) Vcl::Forms::TCustomForm::WndProc
(0078D54D) Vclcommon::C2516_0
(0021B95C) Vcl::Controls::TWinControl::MainWndProc
(003402A8) System::Classes::_18201
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(0000832E) USER32.DLL
(00008527) USER32.DLL
(0003F594) ntdll.dll.KiUserCallbackDispatcher
(00011B34) USER32.DLL.SendMessageW
(00050885) COMCTL32.DLL
(0005091D) COMCTL32.DLL
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(0000C6C0) USER32.DLL.CallWindowProcW
(0021C426) Vcl::Controls::TWinControl::DefaultHandler
(0021C315) Vcl::Controls::TWinControl::WndProc
(00184D80) Vcl::Stdctrls::TButtonControl::WndProc
(003402A8) System::Classes::_18201
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(00009625) USER32.DLL
(0000967B) 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.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.6

Error message:
Division by zero

Stack trace:
(00648E8F)
(007E46BA)
(007E6722)
(007E369C)
(00062496) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(00078142)
(0070F2E1)
(00648F67)
(00648CC8)
(00715551)
(0071819C)
(00723685)
(0001C75B)
(0003F31F)
(003E86DB)
(003E427A)
(003D969E)
(003FEF8B)
(003402A8)
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167CE) USER32.dll
(00016895) USER32.dll.DispatchMessageW

(007E4D25)
(007E62FF)
(00648DBC)
(00648CC8)
(00715551)
(0071819C)
(00723685)
(0001C75B)
(0003F31F)
(003E86DB)
(003E427A)
(003D969E)
(003FEF8B)
(003402A8)
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167CE) USER32.dll
(00016895) USER32.dll.DispatchMessageW

(007E4D25)
(007E62FF)
(00715868)
(0071819C)
(00723685)
(0001C75B)
(0003F31F)
(003E86DB)
(003E427A)
(003D969E)
(003FEF8B)
(003402A8)
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167CE) USER32.dll
(00016895) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

I was doing a simple drag-n-drop of two files from a RHEL 6.x server to my Windows desktop, which I've done hundreds of times. I have never seen this error before.

WinSCP 5.7.6

Error message:
Division by zero

Stack trace:
(00648E8F)
(007E46BA)
(007E6722)
(007E369C)
(00002275) ntdll.dll.RtlConvertUlongToLargeInteger
(0000D485) ntdll.dll.KiUserExceptionDispatcher
(00078142)
(0070F2E1)
(00648F67)
(00648CC8)
(00715551)
(0071819C)
(00723685)
(0001C75B)
(0003F31F)
(003E86DB)
(003E42AC)
(003D969E)
(003FEF8B)
(003402A8)
(00007731) USER32.dll
(00007811) USER32.dll
(000079C8) USER32.dll
(00007A0B) USER32.dll.DispatchMessageW

(007E4D25)
(007E62FF)
(00648DBC)
(00648CC8)
(00715551)
(0071819C)
(00723685)
(0001C75B)
(0003F31F)
(003E86DB)
(003E42AC)
(003D969E)
(003FEF8B)
(003402A8)
(00007731) USER32.dll
(00007811) USER32.dll
(000079C8) USER32.dll
(00007A0B) USER32.dll.DispatchMessageW

(007E4D25)
(007E62FF)
(00715868)
(0071819C)
(00723685)
(0001C75B)
(0003F31F)
(003E86DB)
(003E42AC)
(003D969E)
(003FEF8B)
(003402A8)
(00007731) USER32.dll
(00007811) USER32.dll
(000079C8) USER32.dll
(00007A0B) 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.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.6

Error message:
Division by zero

Stack trace:
(00648E8F)
(007E46BA)
(007E6722)
(007E369C)
(0003EE3E) ntdll.dll.ZwWow64CallFunction64
(0003F5BA) ntdll.dll.KiUserExceptionDispatcher
(00078142)
(0070F2E1)
(00648F67)
(00648CC8)
(00715551)
(0071819C)
(00723685)
(0001C75B)
(0003F31F)
(003E86DB)
(003E427A)
(003D969E)
(003FEF8B)
(003402A8)
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(00009625) USER32.DLL
(0000967B) USER32.DLL.DispatchMessageW

(007E4D25)
(007E62FF)
(00648DBC)
(00648CC8)
(00715551)
(0071819C)
(00723685)
(0001C75B)
(0003F31F)
(003E86DB)
(003E427A)
(003D969E)
(003FEF8B)
(003402A8)
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(00009625) USER32.DLL
(0000967B) USER32.DLL.DispatchMessageW

(007E4D25)
(007E62FF)
(00715868)
(0071819C)
(00723685)
(0001C75B)
(0003F31F)
(003E86DB)
(003E427A)
(003D969E)
(003FEF8B)
(003402A8)
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(00009625) USER32.DLL
(0000967B) USER32.DLL.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

Tried to open a SFTP session to a linux machine, while it was rebootet. Happened once, don't know if reproducible.

WinSCP Portable 5.7.6

Error message:
Division by zero

Stack trace:
(00648E8F)
(007E46BA)
(007E6722)
(007E369C)
(00062496) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(00078142)
(0070F2E1)
(00648F67)
(00648CC8)
(00715551)
(0071819C)
(00723685)
(0001C75B)
(0003F31F)
(003E86DB)
(003E42AC)
(003D969E)
(003FEF8B)
(003402A8)
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167CE) USER32.dll
(00016895) USER32.dll.DispatchMessageW

(007E4D25)
(007E62FF)
(00648DBC)
(00648CC8)
(00715551)
(0071819C)
(00723685)
(0001C75B)
(0003F31F)
(003E86DB)
(003E42AC)
(003D969E)
(003FEF8B)
(003402A8)
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167CE) USER32.dll
(00016895) USER32.dll.DispatchMessageW

(007E4D25)
(007E62FF)
(00715868)
(0071819C)
(00723685)
(0001C75B)
(0003F31F)
(003E86DB)
(003E42AC)
(003D969E)
(003FEF8B)
(003402A8)
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167CE) USER32.dll
(00016895) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.