External exception EEFFACE - TFileOperationProgressType::Restore

<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 5.17.7

Error message:
External exception EEFFACE

Stack trace:
(001134C2) KERNELBASE.dll.RaiseException
(00087E3F) ntdll.dll
(000732D1) ntdll.dll.KiUserExceptionDispatcher
(0050F6BC) Jclhookexcept::_16408
(00F88E7E) C5296_3
(00F8A1C8) _ThrowExceptionLDTC
(00C89146) TFileOperationProgressType::Restore
(00D942D7) TTerminal::OperationStart
(00D94285) TTerminal::OperationStart
(00D9D829) TTerminal::CalculateLocalFilesSize
(00DA3CEF) TTerminal::SynchronizeChecklistCalculateSize
(00DA1D7B) TTerminal::SynchronizeApply
(0001C14E) TCustomScpExplorerForm::FullSynchronize
(0001D09B) TCustomScpExplorerForm::DoFullSynchronize
(00E3AA61) TSynchronizeChecklistDialog::OkButtonClick
(00275957) Vcl::Controls::TControl::Click
(00279F45) Vcl::Controls::TWinControl::WndProc
(001E20D4) Vcl::Stdctrls::TButtonControl::WndProc
(0027A0AB) Vcl::Controls::_17076
(00279F45) Vcl::Controls::TWinControl::WndProc
(0027958C) Vcl::Controls::TWinControl::MainWndProc
(003A4BA8) System::Classes::_18201
(000435C9) USER32.dll
(000240D7) USER32.dll
(00023C75) USER32.dll
(0002D2CD) USER32.dll
(0007328B) ntdll.dll.KiUserCallbackDispatcher
(0002354E) USER32.dll.SendMessageW
(000438F6) COMCTL32.DLL
(0005023E) COMCTL32.DLL
(000435C9) USER32.dll
(000240D7) USER32.dll
(0002362A) USER32.dll.CallWindowProcW
(0027A056) Vcl::Controls::TWinControl::DefaultHandler
(00279F45) Vcl::Controls::TWinControl::WndProc
(001E20D4) Vcl::Stdctrls::TButtonControl::WndProc
(003A4BA8) System::Classes::_18201
(000435C9) USER32.dll
(000240D7) USER32.dll
(00023229) USER32.dll
(0002300B) 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 5.17.7

Error message:
External exception EEFFACE

Stack trace:
(00013878) KERNELBASE.dll.RaiseException
(0003EE3E) ntdll.dll.ZwWow64CallFunction64
(0003F5BA) ntdll.dll.KiUserExceptionDispatcher
(0050F6BC) Jclhookexcept::_16408
(00F88E7E) C5296_3
(00F8A1C8) _ThrowExceptionLDTC
(00C89146) TFileOperationProgressType::Restore
(00D942D7) TTerminal::OperationStart
(00D94285) TTerminal::OperationStart
(00D9D829) TTerminal::CalculateLocalFilesSize
(00DA3CEF) TTerminal::SynchronizeChecklistCalculateSize
(00DA1D7B) TTerminal::SynchronizeApply
(0001C14E) TCustomScpExplorerForm::FullSynchronize
(0001D09B) TCustomScpExplorerForm::DoFullSynchronize
(00E3AA61) TSynchronizeChecklistDialog::OkButtonClick
(00275957) Vcl::Controls::TControl::Click
(00279F45) Vcl::Controls::TWinControl::WndProc
(001E20D4) Vcl::Stdctrls::TButtonControl::WndProc
(0027A0AB) Vcl::Controls::_17076
(00279F45) Vcl::Controls::TWinControl::WndProc
(0027958C) Vcl::Controls::TWinControl::MainWndProc
(003A4BA8) System::Classes::_18201
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(00008327) USER32.DLL
(00008527) USER32.DLL
(0003F594) ntdll.dll.KiUserCallbackDispatcher
(0000D8B4) USER32.DLL.SendMessageW
(000509DE) COMCTL32.DLL
(00050A76) COMCTL32.DLL
(00007E6F) USER32.DLL.CallNextHookEx
(000080CC) USER32.DLL
(00013D90) USER32.DLL.CallWindowProcW
(0027A056) Vcl::Controls::TWinControl::DefaultHandler
(00279F45) Vcl::Controls::TWinControl::WndProc
(001E20D4) Vcl::Stdctrls::TButto

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 5.17.9

Error message:
External exception EEFFACE

Stack trace:
(001134C2) KERNELBASE.dll.RaiseException
(00087E3F) ntdll.dll
(000732D1) ntdll.dll.KiUserExceptionDispatcher
(00510438) Jclhookexcept::_16408
(00F8A786) C5296_0
(00F8BAD0) _ThrowExceptionLDTC
(00C8AA62) TFileOperationProgressType::Restore
(00D95BB3) TTerminal::OperationStart
(00D95B61) TTerminal::OperationStart
(00D9F105) TTerminal::CalculateLocalFilesSize
(00DA55CB) TTerminal::SynchronizeChecklistCalculateSize
(00DA3657) TTerminal::SynchronizeApply
(0001C162) TCustomScpExplorerForm::FullSynchronize
(0001D0AF) TCustomScpExplorerForm::DoFullSynchronize
(00E3C34D) TSynchronizeChecklistDialog::OkButtonClick
(00276703) Vcl::Controls::TControl::Click
(0027ACF1) Vcl::Controls::TWinControl::WndProc
(001E2E80) Vcl::Stdctrls::TButtonControl::WndProc
(0027AE57) Vcl::Controls::_17076
(0027ACF1) Vcl::Controls::TWinControl::WndProc
(0027A338) Vcl::Controls::TWinControl::MainWndProc
(003A5954) System::Classes::_18201
(000435C9) USER32.dll
(000240D7) USER32.dll
(00023C75) USER32.dll
(0002D2CD) USER32.dll
(0007328B) ntdll.dll.KiUserCallbackDispatcher
(0002354E) USER32.dll.SendMessageW
(000438F6) COMCTL32.DLL
(0005023E) COMCTL32.DLL
(000435C9) USER32.dll
(000240D7) USER32.dll
(0002362A) USER32.dll.CallWindowProcW
(0027AE02) Vcl::Controls::TWinControl::DefaultHandler
(0027ACF1) Vcl::Controls::TWinControl::WndProc
(001E2E80) Vcl::Stdctrls::TButtonControl::WndProc
(003A5954) System::Classes::_18201
(000435C9) USER32.dll
(000240D7) USER32.dll
(00023229) USER32.dll
(0002300B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

This error occured when i tried to upload a folder to my WD EX4100 My Cloud backup drive.
This is happening very often.

WinSCP 5.17.9

Error message:
External exception EEFFACE

Stack trace:
(001134C2) KERNELBASE.dll.RaiseException
(00087E3F) ntdll.dll
(000732D1) ntdll.dll.KiUserExceptionDispatcher
(00510438) Jclhookexcept::_16408
(00F8A786) C5296_0
(00F8BAD0) _ThrowExceptionLDTC
(00C8AA62) TFileOperationProgressType::Restore
(00D95BB3) TTerminal::OperationStart
(00D95B61) TTerminal::OperationStart
(00D9F105) TTerminal::CalculateLocalFilesSize
(00DA7965) TTerminal::CopyToRemote
(0000FC56) TCustomScpExplorerForm::ExecuteCopyMoveFileOperation
(00010848) TCustomScpExplorerForm::ExecuteFileOperation
(00010A39) TCustomScpExplorerForm::ExecuteFileOperation
(00010ABF) TCustomScpExplorerForm::ExecuteFileOperationCommand
(00010C46) TCustomScpExplorerForm::ExecuteCopyOperationCommand
(00043C3F) TNonVisualDataModule::ExplorerActionsExecute
(003E9378) System::Actions::TContainedActionList::ExecuteAction
(001C7F61) Vcl::Actnlist::TCustomAction::Execute
(003A5954) System::Classes::_18201
(000435C9) USER32.dll
(000240D7) USER32.dll
(00023229) USER32.dll
(0002300B) USER32.dll.DispatchMessageW

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.

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 5.21.7

Error message:
External exception EEFFACE

Stack trace:
(00137FC2) KERNELBASE.dll.RaiseException
(00087AFF) ntdll.dll
(00073FD1) ntdll.dll.KiUserExceptionDispatcher
(00535524) Jclhookexcept::_16408
(00FE0016) C5412_0
(00FE1360) _ThrowExceptionLDTC
(00CC9886) TFileOperationProgressType::Restore
(00DE3083) TTerminal::OperationStart
(00DE3031) TTerminal::OperationStart
(00DEC67D) TTerminal::CalculateLocalFilesSize
(00DF2B9B) TTerminal::SynchronizeChecklistCalculateSize
(00DF0C27) TTerminal::SynchronizeApply
(0001D866) TCustomScpExplorerForm::FullSynchronize
(0001FB22) TCustomScpExplorerForm::DoFullSynchronizeDirectories
(0005432E) TScpCommanderForm::FullSynchronizeDirectories
(0004C0DF) TNonVisualDataModule::ExplorerActionsExecute
(0040D640) System::Actions::TContainedActionList::ExecuteAction
(001CF72D) Vcl::Actnlist::TCustomAction::Execute
(003C9C40) System::Classes::_18201
(0003FE89) USER32.dll
(00036E55) USER32.dll
(00034BC5) USER32.dll
(0003498B) 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 5.21.7

Error message:
External exception EEFFACE

Stack trace:
(00137FC2) KERNELBASE.dll.RaiseException
(00087AFF) ntdll.dll
(00073FD1) ntdll.dll.KiUserExceptionDispatcher
(00535524) Jclhookexcept::_16408
(00FE0016) C5412_0
(00FE1360) _ThrowExceptionLDTC
(00CC9886) TFileOperationProgressType::Restore
(00DE3083) TTerminal::OperationStart
(00DE3031) TTerminal::OperationStart
(00DEC67D) TTerminal::CalculateLocalFilesSize
(00DF2B9B) TTerminal::SynchronizeChecklistCalculateSize
(00DF0C27) TTerminal::SynchronizeApply
(0001D866) TCustomScpExplorerForm::FullSynchronize
(0001FB22) TCustomScpExplorerForm::DoFullSynchronizeDirectories
(0005432E) TScpCommanderForm::FullSynchronizeDirectories
(0004C0DF) TNonVisualDataModule::ExplorerActionsExecute
(0040D640) System::Actions::TContainedActionList::ExecuteAction
(001CF72D) Vcl::Actnlist::TCustomAction::Execute
(003C9C40) System::Classes::_18201
(0003FE89) USER32.dll
(00036E55) USER32.dll
(00034BC5) USER32.dll
(0003498B) 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 6.3.3

Error message:
External exception EEFFACE

Stack trace:
(00137E82) KERNELBASE.dll.RaiseException
(000959FF) ntdll.dll
(00075421) ntdll.dll.KiUserExceptionDispatcher
(00556F34) Jclhookexcept::_16408
(00E22BB2) C6610_3
(00E23EFC) _ThrowExceptionLDTC
(00B3DA16) TFileOperationProgressType::Restore
(00C6882B) TTerminal::OperationStart
(00C687D9) TTerminal::OperationStart
(00C72351) TTerminal::CalculateLocalFilesSize
(00C78D7B) TTerminal::SynchronizeChecklistCalculateSize
(00C76EA7) TTerminal::SynchronizeApply
(0001FF73) TCustomScpExplorerForm::FullSynchronize
(00020E3B) TCustomScpExplorerForm::DoFullSynchronize
(00D1CFF1) TSynchronizeChecklistDialog::OkButtonClick
(00404EA7) Vcl::Controls::TControl::Click
(00409495) Vcl::Controls::TWinControl::WndProc
(003716A4) Vcl::Stdctrls::TButtonControl::WndProc
(004095FB) Vcl::Controls::_17076
(00409495) Vcl::Controls::TWinControl::WndProc
(00408ADC) Vcl::Controls::TWinControl::MainWndProc
(002271BC) System::Classes::_18201
(00046931) USER32.dll
(00027055) USER32.dll
(00026AE5) USER32.dll
(0002E96D) USER32.dll
(000753DB) ntdll.dll.KiUserCallbackDispatcher
(00025DBE) USER32.dll.SendMessageW
(00065DE6) COMCTL32.DLL
(00096CEC) COMCTL32.DLL
(00046931) USER32.dll
(00027055) USER32.dll
(00025EAA) USER32.dll.CallWindowProcW
(004095A6) Vcl::Controls::TWinControl::DefaultHandler
(00409495) Vcl::Controls::TWinControl::WndProc
(003716A4) Vcl::Stdctrls::TButtonControl::WndProc
(002271BC) System::Classes::_18201
(00046931) USER32.dll
(00027055) USER32.dll
(00025B60) USER32.dll
(0002568B) USER32.dll.DispatchMessageW

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.

@rod: 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.