<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 5.13.4

Error message:
Canvas does not allow drawing

Трассировка стека:
(001FE613) Vcl::Graphics::TCanvas::RequiredState
(0047F653) Tbx::TTBXToolbar::WMEraseBkgnd
(00256E91) Vcl::Controls::TControl::WndProc
(0025B9D5) Vcl::Controls::TWinControl::WndProc
(0025B01C) Vcl::Controls::TWinControl::MainWndProc
(00380D20) System::Classes::_18201
(0003AE69) USER32.dll
(00037335) USER32.dll
(00036ED5) USER32.dll
(00039627) USER32.dll
(0006B6CB) ntdll.dll.KiUserCallbackDispatcher
(00037FEF) USER32.dll.PeekMessageW
(0021F37C) Vcl::Forms::TApplication::ProcessMessage

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 5.11.2

Error message:
Invalid access to memory.

Stack trace:
(001FEE45) Vcl::Graphics::_16833
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(001FEFCF) Vcl::Graphics::_16837
(001FA8A5) Vcl::Graphics::TCanvas::RequiredState
(00461F97) Tb2item::TTBView::DrawItem

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 5.11.2

Error message:
Invalid access to memory.

Stack trace:
(001FEE45) Vcl::Graphics::_16833
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(001FEFCF) Vcl::Graphics::_16837
(001FA8A5) Vcl::Graphics::TCanvas::RequiredState
(00461F97) Tb2item::TTBView::DrawItem

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 5.11.2

Error message:
Invalid access to memory.

Stack trace:
(001FEE45) Vcl::Graphics::_16833
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(001FEFCF) Vcl::Graphics::_16837
(001FA8A5) Vcl::Graphics::TCanvas::RequiredState
(00461F97) Tb2item::TTBView::DrawItem

The problem happens rarely. I cannot reproduce it.

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 5.9.3

Error message:
Canvas does not allow drawing

Stack trace:
(001F1D63) Vcl::Graphics::TCanvas::RequiredState
(004506FB) Tb2item::TTBView::DrawItem

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.

<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:
Canvas does not allow drawing

スタック トレース:
(001BF82F) Vcl::Graphics::TCanvas::RequiredState
(0040F273) Tb2dock::TTBCustomDockableWindow::WMNCPaint
(0021C315) Vcl::Controls::TWinControl::WndProc
(0021B95C) Vcl::Controls::TWinControl::MainWndProc
(003402A8) System::Classes::_18201
(000152F7) USER32.dll
(00016319) USER32.dll.GetDC
(00015DE8) USER32.dll
(00015E49) USER32.dll
(0000F117) ntdll.dll.KiUserCallbackDispatcher
(00015A87) USER32.dll
(00015AE4) USER32.dll
(000152F7) USER32.dll
(00015D35) USER32.dll
(0001FD32) USER32.dll
(0001FD58) USER32.dll.CallWindowProcW
(0021C426) Vcl::Controls::TWinControl::DefaultHandler
(0021C315) Vcl::Controls::TWinControl::WndProc
(001D70B8) Vcl::Forms::TCustomForm::WndProc
(0078D54D) Vclcommon::C2516_0
(0021B95C) Vcl::Controls::TWinControl::MainWndProc
(003402A8) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(00015DE8) USER32.dll
(00015E49) USER32.dll
(0000F117) ntdll.dll.KiUserCallbackDispatcher
(0001F75C) USER32.dll
(001E0598) Vcl::Forms::TApplication::ProcessMessage

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 5.7.7

Error message:
Canvas does not allow drawing

Stack trace:
(001BFB23) Vcl::Graphics::TCanvas::RequiredState
(00447DF8) Tbxofficexptheme::TTBXOfficeXPTheme::PaintImage
(0042E3AD) Tbx::DrawTBXImage
(0044C653) Tbxstatusbars::TTBXCustomStatusBar::PaintPanel

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 5.7.7

Error message:
Canvas does not allow drawing

Stack trace:
(001BFB23) Vcl::Graphics::TCanvas::RequiredState
(00422CD3) Tb2item::TTBView::DrawItem

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:
Canvas does not allow drawing

Stack trace:
(001BF82F) Vcl::Graphics::TCanvas::RequiredState
(004313A7) Tbx::TTBXToolbar::WMEraseBkgnd
(002177D1) Vcl::Controls::TControl::WndProc
(0021C315) Vcl::Controls::TWinControl::WndProc
(0021B95C) Vcl::Controls::TWinControl::MainWndProc
(003402A8) System::Classes::_18201
(00033921) USER32.dll
(0001378B) USER32.dll
(0001336B) USER32.dll
(0001A177) USER32.dll
(00069B54) ntdll.dll.KiUserCallbackDispatcher
(004321DA) Tbx::_16631
(0044F3A8) Tbxthemes::_16460
(00033921) USER32.dll
(0001378B) USER32.dll
(0001336B) USER32.dll
(0001C53E) USER32.dll
(00069B54) ntdll.dll.KiUserCallbackDispatcher
(00019D9A) USER32.dll.PeekMessageW

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 5.7.1

Error message:
Canvas does not allow drawing

Stack trace:
[00BFFCFF] Vcl::Graphics::TCanvas::RequiredState
[00E62E3F] Tb2item::TTBView::DrawItem

The problem happens rarely. I cannot reproduce it.

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 5.7.3

Error message:
Canvas does not allow drawing

Stack trace:
(001BF40F) Vcl::Graphics::TCanvas::RequiredState
(0044C33B) Tbxstatusbars::TTBXCustomStatusBar::UpdatePanels
(00014D0C) TCustomScpExplorerForm::Idle
(0003793B) TNonVisualDataModule::DoIdle
(000378F8) TNonVisualDataModule::SessionIdleTimerTimer
(0033FE18) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

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.

WinSCP was in sync mode and I had left it idle. After I came back after 1 hour this error appeared.
System information
Windows 7
64 bit
16 GB
Intel i7 Core

WinSCP 5.7

Error message:
Canvas does not allow drawing

Stack trace:
[014AFC6F] Vcl::Graphics::TCanvas::RequiredState
[01712DAF] Tb2item::TTBView::DrawItem

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)>

I had been using WinSCP and left for a few hours. I think Windows Home 8.1 went into sleep mode or hibernation mode and
when I woke it up the whole system was unresponsive to window clicks, or right or left mouse clicks.
The system is an I7 Processor with 8GB ram.
CPU

Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz

Maximum speed: 4.00 GHz
Sockets: 1
Cores: 4
Logical processors: 8
Virtualization: Enabled
L1 cache: 256 KB
L2 cache: 1.0 MB
L3 cache: 8.0 MB

Utilization 17%
Speed 4.32 GHz
Up time 1:05:19:44
Processes 114
Threads 1463
Handles 93951



WinSCP 5.7.1

Error message:
Canvas does not allow drawing

Stack trace:
[009FFCFF] Vcl::Graphics::TCanvas::RequiredState
[00C62E3F] Tb2item::TTBView::DrawItem

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 5.6.1

Error message:
Canvas does not allow drawing

Stack trace:
[0146AE67] Vcl::Graphics::TCanvas::RequiredState
[016CE483] Tb2item::TTBView::DrawItem