Cannot focus a disabled or invisible window - Vcl::Forms::TCustomForm::SetFocus

<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

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(0023860D) Vcl::Forms::TCustomForm::SetFocus
(00019DA7) TCustomScpExplorerForm::FormCloseQuery
(002381A1) Vcl::Forms::TCustomForm::CloseQuery
(003A4568) System::Classes::_18201
(00043389) USER32.dll
(00023F87) USER32.dll
(00023B25) USER32.dll
(0002D0DD) USER32.dll
(000731DB) ntdll.dll.KiUserCallbackDispatcher
(0002533A) USER32.dll
(00025CD6) UXTHEME.DLL.IsThemeActive
(00028850) UXTHEME.DLL
(00027F33) UXTHEME.DLL
(000255B1) USER32.dll
(0023C2A5) Vcl::Forms::_16944
(0023C511) Vcl::Forms::TApplication::WndProc
(003A4568) System::Classes::_18201
(00043389) USER32.dll
(00023F87) USER32.dll
(000230D9) USER32.dll
(00022EBB) 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)>
I connected to a server, then I left the PC. A day after, when I logged in, the connection cannot be reseted, because it needed a VPN, so the Winscp showed me a dialog, that cannot reconnect to the server. I canceled the dialog, and connected to another connection (to a different one). When it connected, I could not clicked to anything. I pressed Alt+F4 to restart the program, and this report dialog came up.

WinSCP 5.17.1

Error message:
Cannot focus a disabled or invisible window

Veremkivonat:
(0023861D) Vcl::Forms::TCustomForm::SetFocus
(00019DA7) TCustomScpExplorerForm::FormCloseQuery
(002381B1) Vcl::Forms::TCustomForm::CloseQuery
(003A4578) System::Classes::_18201
(00043449) USER32.dll
(00023F87) USER32.dll
(00023B25) USER32.dll
(0002D16D) USER32.dll
(000731DB) ntdll.dll.KiUserCallbackDispatcher
(0002533A) USER32.dll
(00025CD6) UXTHEME.DLL.IsThemeActive
(00028850) UXTHEME.DLL
(00027F33) UXTHEME.DLL
(000255B1) USER32.dll
(0023C2B5) Vcl::Forms::_16944
(0023C521) Vcl::Forms::TApplication::WndProc
(003A4578) System::Classes::_18201
(00043449) USER32.dll
(00023F87) USER32.dll
(000230D9) USER32.dll
(00022EBB) 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 5.17.1

Error message:
Cannot focus a disabled or invisible window

Traza de la pila:
(0023861D) Vcl::Forms::TCustomForm::SetFocus
(00019DA7) TCustomScpExplorerForm::FormCloseQuery
(002381B1) Vcl::Forms::TCustomForm::CloseQuery
(003A4578) System::Classes::_18201
(00044CA9) USER32.dll
(000357B7) USER32.dll
(00035355) USER32.dll
(0004212D) USER32.dll
(000718FB) ntdll.dll.KiUserCallbackDispatcher
(00036B5A) USER32.dll
(0002F2E1) UXTHEME.DLL.EnableThemeDialogTexture
(00031D35) UXTHEME.DLL
(00031413) UXTHEME.DLL
(00036DD1) USER32.dll
(0023C2B5) Vcl::Forms::_16944
(0023C521) Vcl::Forms::TApplication::WndProc
(003A4578) System::Classes::_18201
(00044CA9) USER32.dll
(000357B7) USER32.dll
(000348F6) USER32.dll
(000346CB) 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

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(0023860D) Vcl::Forms::TCustomForm::SetFocus
(00019DA7) TCustomScpExplorerForm::FormCloseQuery
(002381A1) Vcl::Forms::TCustomForm::CloseQuery
(003A4568) System::Classes::_18201
(00043449) USER32.dll
(00023F87) USER32.dll
(00023B25) USER32.dll
(0002D16D) USER32.dll
(000731DB) ntdll.dll.KiUserCallbackDispatcher
(0002533A) USER32.dll
(00025CD6) UXTHEME.DLL.IsThemeActive
(00028850) UXTHEME.DLL
(00027F33) UXTHEME.DLL
(000255B1) USER32.dll
(0023C2A5) Vcl::Forms::_16944
(0023C511) Vcl::Forms::TApplication::WndProc
(003A4568) System::Classes::_18201
(00043449) USER32.dll
(00023F87) USER32.dll
(000230D9) USER32.dll
(00022EBB) 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 5.17.3

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(00238885) Vcl::Forms::TCustomForm::SetFocus
(00019DA7) TCustomScpExplorerForm::FormCloseQuery
(00238419) Vcl::Forms::TCustomForm::CloseQuery
(003A47E0) System::Classes::_18201
(00043449) USER32.dll
(00023F87) USER32.dll
(00023B25) USER32.dll
(0002D16D) USER32.dll
(0007327B) ntdll.dll.KiUserCallbackDispatcher
(0002533A) USER32.dll
(00025CD6) UXTHEME.DLL.IsThemeActive
(00028850) UXTHEME.DLL
(00027F33) UXTHEME.DLL
(000255B1) USER32.dll
(0023C51D) Vcl::Forms::_16944
(0023C789) Vcl::Forms::TApplication::WndProc
(003A47E0) System::Classes::_18201
(00043449) USER32.dll
(00023F87) USER32.dll
(000230D9) USER32.dll
(00022EBB) 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 5.17.2

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(0023861D) Vcl::Forms::TCustomForm::SetFocus
(00019DA7) TCustomScpExplorerForm::FormCloseQuery
(002381B1) Vcl::Forms::TCustomForm::CloseQuery
(003A4578) System::Classes::_18201
(00044CA9) USER32.dll
(000357B7) USER32.dll
(00035355) USER32.dll
(0004212D) USER32.dll
(00071ADB) ntdll.dll.KiUserCallbackDispatcher
(00036B5A) USER32.dll
(0002F2E1) UXTHEME.DLL.EnableThemeDialogTexture
(00031D35) UXTHEME.DLL
(00031413) UXTHEME.DLL
(00036DD1) USER32.dll
(0023C2B5) Vcl::Forms::_16944
(0023C521) Vcl::Forms::TApplication::WndProc
(003A4578) System::Classes::_18201
(00044CA9) USER32.dll
(000357B7) USER32.dll
(000348F6) USER32.dll
(000346CB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

Sudden error pops up

WinSCP 5.17.5

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(00238B4D) Vcl::Forms::TCustomForm::SetFocus

The problem happens rarely. I cannot reproduce it.

Tried to expand destination folder and couldn't. The app froze and showed this error. I couldn't even close it

WinSCP 5.17.2

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(0023861D) Vcl::Forms::TCustomForm::SetFocus
(00019DA7) TCustomScpExplorerForm::FormCloseQuery
(002381B1) Vcl::Forms::TCustomForm::CloseQuery
(003A4578) System::Classes::_18201
(000436C9) USER32.dll
(000250B7) USER32.dll
(00024C55) USER32.dll
(0002D62D) USER32.dll
(000731CB) ntdll.dll.KiUserCallbackDispatcher
(0002646A) USER32.dll
(00025CD6) UXTHEME.DLL.IsThemeActive
(00028850) UXTHEME.DLL
(00027F33) UXTHEME.DLL
(000266E1) USER32.dll
(0023C2B5) Vcl::Forms::_16944
(0023C521) Vcl::Forms::TApplication::WndProc
(003A4578) System::Classes::_18201
(000436C9) USER32.dll
(000250B7) USER32.dll
(00024209) USER32.dll
(00023FCB) 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)>

I'm trying to exit WinSCP by pressing Alt+F4, because it seems stuck trying to load folders, and I can't find a way to cancel this. But the program refuses to exit, or stop trying to load folders.


WinSCP 5.17.6

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(00238B6D) Vcl::Forms::TCustomForm::SetFocus
(00019DAB) TCustomScpExplorerForm::FormCloseQuery
(00238701) Vcl::Forms::TCustomForm::CloseQuery
(003A4AC8) System::Classes::_18201
(000434B9) USER32.dll
(00023FF7) USER32.dll
(00023B95) USER32.dll
(0002D1DD) USER32.dll
(0007328B) ntdll.dll.KiUserCallbackDispatcher
(000253AA) USER32.dll
(00025CD6) UXTHEME.DLL.IsThemeActive
(00028850) UXTHEME.DLL
(00027F33) UXTHEME.DLL
(00025621) USER32.dll
(0023C805) Vcl::Forms::_16944
(0023CA71) Vcl::Forms::TApplication::WndProc
(003A4AC8) System::Classes::_18201
(000434B9) USER32.dll
(00023FF7) USER32.dll
(00023149) USER32.dll
(00022F2B) 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 5.17.2

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(0023861D) Vcl::Forms::TCustomForm::SetFocus
(00019DA7) TCustomScpExplorerForm::FormCloseQuery
(002381B1) Vcl::Forms::TCustomForm::CloseQuery
(003A4578) System::Classes::_18201
(0003AAF9) USER32.dll
(00036E75) USER32.dll
(00036A15) USER32.dll
(00039167) USER32.dll
(0006BD3B) ntdll.dll.KiUserCallbackDispatcher
(00034EAA) USER32.dll
(00024811) UXTHEME.DLL
(000245E0) UXTHEME.DLL
(00037E2F) UXTHEME.DLL
(00036B53) UXTHEME.DLL
(00035130) USER32.dll
(0023C2B5) Vcl::Forms::_16944
(0023C521) Vcl::Forms::TApplication::WndProc
(003A4578) System::Classes::_18201
(0003AAF9) USER32.dll
(00036E75) USER32.dll
(00036729) USER32.dll
(0003650B) USER32.dll.DispatchMessageW
(00017082)QIPCAP.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.

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.

Happens when 2 monitors are connected/disconnected due to hdmi switch, and winscp should reconnect to a host

WinSCP 5.17.1

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(0023861D) Vcl::Forms::TCustomForm::SetFocus
(00019DA7) TCustomScpExplorerForm::FormCloseQuery
(002381B1) Vcl::Forms::TCustomForm::CloseQuery
(003A4578) System::Classes::_18201
(00044CA9) USER32.dll
(000357B7) USER32.dll
(00035355) USER32.dll
(0004212D) USER32.dll
(00071ADB) ntdll.dll.KiUserCallbackDispatcher
(00036B5A) USER32.dll
(0002F2E1) UXTHEME.DLL.EnableThemeDialogTexture
(00031D35) UXTHEME.DLL
(00031413) UXTHEME.DLL
(00036DD1) USER32.dll
(0023C2B5) Vcl::Forms::_16944
(0023C521) Vcl::Forms::TApplication::WndProc
(003A4578) System::Classes::_18201
(00044CA9) USER32.dll
(000357B7) USER32.dll
(000348F6) USER32.dll
(000346CB) 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 5.15.4

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(00237ECD)
(000197C3)
(00237A61)
(003A3E28)
(000434B9) USER32.dll
(00023FF7) USER32.dll
(00023B95) USER32.dll
(0002D1DD) USER32.dll
(0007328B) ntdll.dll.KiUserCallbackDispatcher
(000253AA) USER32.dll
(00025CD6) UXTHEME.DLL.IsThemeActive
(00028850) UXTHEME.DLL
(00027F33) UXTHEME.DLL
(00025621) USER32.dll
(0023BB65)
(0023BDD1)
(003A3E28)
(000434B9) USER32.dll
(00023FF7) USER32.dll
(00023149) USER32.dll
(00022F2B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

raisage@... wrote:

I'm trying to exit WinSCP by pressing Alt+F4, because it seems stuck trying to load folders, and I can't find a way to cancel this. But the program refuses to exit, or stop trying to load folders.

This bug has been added to the tracker:
https://winscp.net/tracker/1880

pressing alt+tab with a mouse macro, usually with others app the alt key is still pressing down

WinSCP 5.17.7

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(00238C4D) Vcl::Forms::TCustomForm::SetFocus

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:
Cannot focus a disabled or invisible window

Stack trace:
(00238C4D) Vcl::Forms::TCustomForm::SetFocus

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:
Cannot focus a disabled or invisible window

Stack trace:
(002399F9) Vcl::Forms::TCustomForm::SetFocus

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 5.17.8

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(00239969) Vcl::Forms::TCustomForm::SetFocus
(00DDB451) TEditorForm::Find
(00DDAECC) TEditorForm::FindDialogFind
(0025C450) Vcl::Dialogs::_16489
(003A58C4) System::Classes::_18201
(0003DF59) USER32.dll
(00034ED5) USER32.dll
(00034AD5) USER32.dll
(0003869D) USER32.dll
(00072AEB) ntdll.dll.KiUserCallbackDispatcher
(000328FA) USER32.dll.SendMessageW
(000616D6) COMDLG32.DLL.FindTextW
(0003DF59) USER32.dll
(00031661) USER32.dll
(00030DCB) USER32.dll
(00030BF0) USER32.dll
(0003DF59) USER32.dll
(00034ED5) USER32.dll
(000345B2) USER32.dll
(00032756) USER32.dll.CallWindowProcW
(0025C5BA) Vcl::Dialogs::TCommonDialog::DefaultHandler
(003A58C4) System::Classes::_18201
(0003DF59) USER32.dll
(00034ED5) USER32.dll
(000345B2) USER32.dll
(00032756) USER32.dll.CallWindowProcW
(0025E768) Vcl::Dialogs::_16594
(0025E813) Vcl::Dialogs::_16595
(0003DF59) USER32.dll
(00034ED5) USER32.dll
(00034AD5) USER32.dll
(0003869D) USER32.dll
(00072AEB) ntdll.dll.KiUserCallbackDispatcher
(000328FA) USER32.dll.SendMessageW
(00035DA2) COMCTL32.DLL
(000759CE) COMCTL32.DLL
(0003DF59) USER32.dll
(00034ED5) USER32.dll
(00032C45) USER32.dll
(00036E43) USER32.dll.IsDialogMessageW

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 5.17.10

Error message:
Cannot focus a disabled or invisible window

Трассировка стека:
(00239A1D) Vcl::Forms::TCustomForm::SetFocus
(00DDB731) TEditorForm::Find
(00DDB1AC) TEditorForm::FindDialogFind
(0025C504) Vcl::Dialogs::_16489
(003A5978) System::Classes::_18201
(0003DEB9) USER32.dll
(00034E75) USER32.dll
(00034A75) USER32.dll
(0003863D) USER32.dll
(00073E7B) ntdll.dll.KiUserCallbackDispatcher
(0003289A) USER32.dll.SendMessageW
(00061286) COMDLG32.DLL.FindTextW
(0003DEB9) USER32.dll
(00031601) USER32.dll
(00030D6B) USER32.dll
(00030B90) USER32.dll
(0003DEB9) USER32.dll
(00034E75) USER32.dll
(00034552) USER32.dll
(000326F6) USER32.dll.CallWindowProcW
(0025C66E) Vcl::Dialogs::TCommonDialog::DefaultHandler
(003A5978) System::Classes::_18201
(0003DEB9) USER32.dll
(00034E75) USER32.dll
(00034552) USER32.dll
(000326F6) USER32.dll.CallWindowProcW
(0025E81C) Vcl::Dialogs::_16594
(0025E8C7) Vcl::Dialogs::_16595
(0003DEB9) USER32.dll
(00034E75) USER32.dll
(00034A75) USER32.dll
(0003863D) USER32.dll
(00073E7B) ntdll.dll.KiUserCallbackDispatcher
(0003289A) USER32.dll.SendMessageW
(00035612) COMCTL32.DLL
(00074F2E) COMCTL32.DLL
(0003DEB9) USER32.dll
(00034E75) USER32.dll
(00032BE5) USER32.dll
(00036DE3) USER32.dll.IsDialogMessageW

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 5.17.10

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(00239A1D) Vcl::Forms::TCustomForm::SetFocus

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 5.19.4

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(0023F01D) Vcl::Forms::TCustomForm::SetFocus
(004AC15E) Tb2dock::TTBFloatingWindowParent::CMDialogKey
(00280315) Vcl::Controls::TWinControl::WndProc
(0023A7DC) Vcl::Forms::TCustomForm::WndProc
(0027B40C) Vcl::Controls::TControl::Perform
(0028280D) Vcl::Controls::TWinControl::CNKeyDown
(00280315) Vcl::Controls::TWinControl::WndProc
(0023A7DC) Vcl::Forms::TCustomForm::WndProc
(0027F95C) Vcl::Controls::TWinControl::MainWndProc
(003C7A98) System::Classes::_18201
(000421D9) USER32.dll
(00039175) USER32.dll
(00038D75) USER32.dll
(0003C93D) USER32.dll
(00073E9B) ntdll.dll.KiUserCallbackDispatcher
(00036B9A) USER32.dll.SendMessageW

The problem happens rarely. I cannot reproduce it.

I wasn't even paying attention to WinSCP when this occurred. I had the Check for Updates window open, and then was browsing the site, joining Patreon, registering on the forums, etc. When I looked back at the program, there was an error visible. I believe that the transfer I had running had finished well ahead of the error displaying.

WinSCP 5.19.4

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(0023F01D) Vcl::Forms::TCustomForm::SetFocus

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 5.21.3

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(00241181) Vcl::Forms::TCustomForm::SetFocus

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 5.21.5

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(00241191) Vcl::Forms::TCustomForm::SetFocus

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 5.21.6

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(00241199) Vcl::Forms::TCustomForm::SetFocus

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 6.1.1

Error message:
Cannot focus a disabled or invisible window

Трассировка стека:
(003B502D) Vcl::Forms::TCustomForm::SetFocus

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.)>
happens often when asking to modify multiple files at once (edit sotfware dreamweaver)
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(003B58E1) Vcl::Forms::TCustomForm::SetFocus

(01004455) C6083_0
(01005A2F) _ReThrowException
(00DFB9A7) TTerminal::DoProgress
(00CDDED4) TFileOperationProgressType::DoProgress
(0001519E) TCustomScpExplorerForm::TemporarilyDownloadFiles
(00015DA5) TCustomScpExplorerForm::ExecuteFile
(000164C3) TCustomScpExplorerForm::ExecuteFile
(0004D66C) TNonVisualDataModule::ExplorerActionsExecute
(0026344C) System::Actions::TContainedActionList::ExecuteAction
(00347061) Vcl::Actnlist::TCustomAction::Execute
(0021564C) System::Classes::_18201
(0003FEA9) USER32.dll
(00036E55) USER32.dll
(00034BC5) USER32.dll
(0003498B) USER32.dll.DispatchMessageW

(01004455) C6083_0
(01005A2F) _ReThrowException
(0001530B) TCustomScpExplorerForm::TemporarilyDownloadFiles
(00015DA5) TCustomScpExplorerForm::ExecuteFile
(000164C3) TCustomScpExplorerForm::ExecuteFile
(0004D66C) TNonVisualDataModule::ExplorerActionsExecute
(0026344C) System::Actions::TContainedActionList::ExecuteAction
(00347061) Vcl::Actnlist::TCustomAction::Execute
(0021564C) System::Classes::_18201
(0003FEA9) USER32.dll
(00036E55) USER32.dll
(00034BC5) USER32.dll
(0003498B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

It happens when I try do modify multiple files
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
Cannot focus a disabled or invisible window

Stack trace:
(003B58E1) Vcl::Forms::TCustomForm::SetFocus

(01004455) C6083_0
(01005A2F) _ReThrowException
(00DFB9A7) TTerminal::DoProgress
(00CDDED4) TFileOperationProgressType::DoProgress
(0001519E) TCustomScpExplorerForm::TemporarilyDownloadFiles
(00015DA5) TCustomScpExplorerForm::ExecuteFile
(000164C3) TCustomScpExplorerForm::ExecuteFile
(0004D66C) TNonVisualDataModule::ExplorerActionsExecute
(0026344C) System::Actions::TContainedActionList::ExecuteAction
(00347061) Vcl::Actnlist::TCustomAction::Execute
(0021564C) System::Classes::_18201
(0003FEA9) USER32.dll
(00036E55) USER32.dll
(00034BC5) USER32.dll
(0003498B) USER32.dll.DispatchMessageW

(01004455) C6083_0
(01005A2F) _ReThrowException
(0001530B) TCustomScpExplorerForm::TemporarilyDownloadFiles
(00015DA5) TCustomScpExplorerForm::ExecuteFile
(000164C3) TCustomScpExplorerForm::ExecuteFile
(0004D66C) TNonVisualDataModule::ExplorerActionsExecute
(0026344C) System::Actions::TContainedActionList::ExecuteAction
(00347061) Vcl::Actnlist::TCustomAction::Execute
(0021564C) System::Classes::_18201
(0003FEA9) USER32.dll
(00036E55) USER32.dll
(00034BC5) USER32.dll
(0003498B) 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.

@tommasocrippa: 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.