SystemAccessViolation attempting to call iMacros from script

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SystemAccessViolation attempting to call iMacros from script

by Tom, Tech Support on Fri Jan 07, 2011 10:20 am

An iMacros Scripting Edition user recently reported the following:
I can't use imacros from within a script any longer, I get this "Windowless ActiveX controls are not supported" error. The full erro is below.

Here you can find a screenshot: ... 104229.png

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.Reflection.TargetInvocationException: Unable to get the window handle for the '#=qaWai2E6q$nhGkSch1YwW424Ix$QqdjAJmhrjbJsV4Eg=' control. Windowless ActiveX controls are not supported. ---> System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
at System.Windows.Forms.UnsafeNativeMethods.IOleObject.DoVerb(Int32 iVerb, IntPtr lpmsg, IOleClientSite pActiveSite, Int32 lindex, IntPtr hwndParent, COMRECT lprcPosRect)
at System.Windows.Forms.WebBrowserBase.DoVerb(Int32 verb)
at System.Windows.Forms.WebBrowserBase.TransitionFromRunningToInPlaceActive()
--- End of inner exception stack trace ---
at System.Windows.Forms.WebBrowserBase.TransitionFromRunningToInPlaceActive()
at System.Windows.Forms.WebBrowserBase.TransitionUpTo(AXState state)
at System.Windows.Forms.WebBrowserBase.OnVisibleChanged(EventArgs e)
at System.Windows.Forms.Control.OnParentVisibleChanged(EventArgs e)
at System.Windows.Forms.Control.OnVisibleChanged(EventArgs e)
at System.Windows.Forms.ScrollableControl.OnVisibleChanged(EventArgs e)
at System.Windows.Forms.Control.SetVisibleCore(Boolean value)
at System.Windows.Forms.TabPage.set_Visible(Boolean value)
at System.Windows.Forms.TabControl.UpdateTabSelection(Boolean updateFocus)
at System.Windows.Forms.TabControl.OnHandleCreated(EventArgs e)
at System.Windows.Forms.Control.WmCreate(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.TabControl.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

The cause was later determined to be due to Windows Data Execution Prevention (DEP). If you have DEP enabled on your machine, you might also need to add an exception for iMacros:

DEP-2 (english).png

Tom, iMacros Support
Tom, Tech Support
Posts: 3337
Joined: Mon May 31, 2010 9:59 am

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