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CageMan
Posts: 21
Joined: 2010-11-04
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On my clients computer an AccessViolationException occurs every time PowerPoint starts. I have added this code to the PowerPoint AfterPresentationOpen event.
var presentation = (_Presentation)hostObj;
var windows = presentation.Windows;
using (new ComObject(windows))
{
try
{
var count = windows.Count;
if (count == 0)
return;
}
catch (AccessViolationException)
{
}
}
The exception occurs on the VSTA_Main thread when I call the windows count property. Please find below the stack trace.
Assembly Full Name: AddinExpress.MSO.2005, Version=6.7.3061.2005, Culture=neutral, PublicKeyToken=4416dd98f0861965
Assembly Version: 6.7.3061.2005
Exception Source: Microsoft.Office.Interop.PowerPoint
Exception Type: System.AccessViolationException
Exception Message: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Exception Target Site: get_Count
---- Stack Trace ----
Microsoft.Office.Interop.PowerPoint.DocumentWindows.get_Count()
AddinExpress.MSO.2005.DLL: N 00000 (0x0) JIT
PF.Production.Addin.AddinModule.adxPowerPointEvents_AfterPresentationOpen(sender As Object, hostObj As Object)
AddinExpress.MSO.2005.DLL: N 0022 (0x16) IL
AddinExpress.MSO.ADXPowerPointAppEvents.DoAfterPresentationOpen(presentation As Object)
AddinExpress.MSO.2005.DLL: N 0008 (0x8) IL
(Outer Exception)
Assembly Full Name: AddinExpress.MSO.2005, Version=6.7.3061.2005, Culture=neutral, PublicKeyToken=4416dd98f0861965
Assembly Version: 6.7.3061.2005
Exception Source:
Exception Type: AddinExpress.MSO.ADXExternalException
Exception Message: An error has occurred in the code of the add-in.
Exception Target Site: Object reference not set to an instance of an object.
---- Stack Trace ----
I have found out that another VSTO addin is loading a hidden presentation in the background. However, I could not find a way to handle this error. Do you have any idea how I can catch this error and handle it?
Best,
Thomas |
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Posted 22 Jun, 2012 04:31:35
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Eugene Astafiev
Guest
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Hi Thomas,
I have just tested the following code on my machine with Windows 7 SP1 and Office 2010 (both are x64).
private void adxPowerPointEvents_AfterPresentationOpen(object sender, object hostObj)
{
var presentation = (PowerPoint.Presentation)hostObj;
var windows = presentation.Windows;
try
{
var count = windows.Count;
if (count == 0)
return;
}
catch (AccessViolationException ex)
{
System.Windows.Forms.MessageBox.Show(ex.Message);
}
}
The code works like a charm; I didn't notice anything strange on my road.
Where does the ComObject class come from? Do you run another threads in the add-in? |
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Posted 22 Jun, 2012 07:11:46
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CageMan
Posts: 21
Joined: 2010-11-04
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Hi Eugene,
I am not using any threads in my addin. I just created a blank solution and I still have this error. If I place a breakpoint in AfterPresentationOpen method the breakpoint is hit on a thread called VSTA_Main. As soon as I disable this third party addin everything works like a charm. |
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Posted 23 Jun, 2012 00:32:53
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Eugene Astafiev
Guest
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Hi Thomas,
Could you please send a sample add-in project which can reproduce the issue to the support e-mail address (see the readme.txt file for details)? I will test it on our PCs.
BTW What PowerPoint version do you have installed on the PC? |
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Posted 23 Jun, 2012 10:55:22
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CageMan
Posts: 21
Joined: 2010-11-04
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Hi Eugene,
I am using Windows 7 and Office 2010 (both are x64). Unfortunately my clients customer doesn't allow me to provide you a copy of his add-in. I would be able to send you my test project but I guess it will not help at all. The error only occurs in conjunction with this other add-in. Provided that you are agree, another option would be to connect to my computer remotely. Please let me know what do you think about it.
Best,
Thomas |
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Posted 24 Jun, 2012 06:39:59
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Eugene Astafiev
Guest
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Hi Thomas,
Well, we can do a remote session tomorrow. But I think it will not help. May I ask you to test a VSTO based add-in project instead in the fields? Does it work?
Anyway, please remember that our office is open from 9:00AM to 5:00PM (GMT) if want to share your PC/customer remotely. |
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Posted 24 Jun, 2012 14:10:35
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CageMan
Posts: 21
Joined: 2010-11-04
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Hi Eugene.
I have created a VSTO based addin for Office 2010. I get the exact same error. Please find below the call stack.
Line 1
[Managed to Native Transition]
Line 2 TestAddin1.DLL!TestAddin1.ThisAddIn.Application_AfterPresentationOpen(Microsoft.Office.Interop.PowerPoint.Presentation pres)
Line 3
[Native to Managed Transition]
Line 4
mscorlib.dll!System.Delegate.DynamicInvokeImpl(object[] args) + 0x6f bytes
Line 5
mscorlib.dll!System.Runtime.InteropServices.ComEventsMethod.DelegateWrapper.Invoke(object[] args) + 0xc2 bytes
Line 6
mscorlib.dll!System.Runtime.InteropServices.ComEventsMethod.Invoke(object[] args) + 0x39 bytes
Line 7 mscorlib.dll!System.Runtime.InteropServices.ComEventsSink.System.Runtime.InteropServices.NativeMethods.IDispatch.Invoke(int dispid, ref System.Guid riid, int lcid,
Line 8
System.Runtime.InteropServices.ComTypes.INVOKEKIND wFlags, ref System.Runtime.InteropServices.ComTypes.DISPPARAMS pDispParams, System.IntPtr pvarResult, System.IntPtr pExcepInfo, System.IntPtr puArgErr) + 0x24e bytes
Line 9
[Appdomain Transition]
Line 10
[Native to Managed Transition]
Line 11
[Managed to Native Transition]
Line 12
AW PowerPoint2010.DLL!AW_PowerPoint_2010.rbnAW.AddShapeToGallary(Microsoft.Office.Tools.Ribbon.RibbonGallery galrShapes) + 0xc6a bytes
Line 13
AW PowerPoint 2010.DLL!AW_PowerPoint_2010.rbnAW.rbnAW_Load(object sender, Microsoft.Office.Tools.Ribbon.RibbonUIEventArgs e) + 0xd3 bytes
Line 14
Microsoft.Office.Tools.Common.Implementation.dll!Microsoft.Office.Tools.Ribbon.RibbonManagerImpl.CreateRibbon(string ribbonId, object context) + 0x139 bytes
Line 15
Microsoft.Office.Tools.Common.Implementation.dll!Microsoft.Office.Tools.Ribbon.RibbonManagerImpl.GetRibbon(Microsoft.Office.Core.IRibbonControl control) + 0x104 bytes
Line 16
Microsoft.Office.Tools.Common.Implementation.dll!Microsoft.Office.Tools.Ribbon.RibbonManagerImpl.Invoke(Microsoft.Office.Tools.Ribbon.RibbonComponentCallback callback, object[] args) + 0x80 bytes
Line 17
Microsoft.Office.Tools.Common.Implementation.dll!Microsoft.Office.Tools.Ribbon.RibbonManagerImpl.System.Reflection.IReflect.InvokeMember(string name, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, object target, object[] args, System.Reflection.ParameterModifier[] modifiers, System.Globalization.CultureInfo culture, s tring[] namedParameters) + 0xf2 bytes
Line 18
[Native to Managed Transition]
Line 19
[Appdomain Transition] |
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Posted 24 Jun, 2012 23:19:01
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Eugene Astafiev
Guest
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Hi Thomas,
It confirms my assumptions that the cause of the issue doesn't depend on Add-in Express. Instead, I would recommend contacting the problematic add-in developers because you can reproduce the issue even with a regular VSTO based add-in project. |
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Posted 25 Jun, 2012 03:09:53
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CageMan
Posts: 21
Joined: 2010-11-04
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Hi Eugene,
I came up with the idea to use ADXAddinModule.SendMessge() whenever the AfterPresentationOpen event occurs on a different thread and then to handle the OnSendMessage event to perform required actions. I thought OnSendMessage will always occur on the main thread but in my case it occurs like any other event on the VSTA_Main thread. Did I misunderstand something or is it possible that the other addin is messing everything up? |
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Posted 25 Jun, 2012 05:47:36
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Eugene Astafiev
Guest
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Hi Thomas,
Yes, you are on the right avenue. It looks like the other add-in is the "real" cause of the issue you faced with. Please try to contact the add-in developers instead. |
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Posted 25 Jun, 2012 06:05:08
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