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Looks like a threading issue here. Can you make sure that your code of showing the Ad is wrapped in Dispatcher?
ThrowOnExternalCallFailed() on Windows 10 17763 and lower
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(256, 0%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EH%3C/text%3E%3C/svg%3E)
Hong
1,216
Reputation points
An app with Target version: 18362 and Min version: 16299 works flawlessly on Windows 10 18362, 18363, but it throws exceptions by System.Runtime.InteropServices.McgMarshal.ThrowOnExternalCallFailed on 17763 and lower:
From 17763:
Exception from OnLaunched():
The text associated with this error code could not be found.
Cannot create instance of type 'Microsoft.Advertising.WinRT.UI.AdControl' [Line: 0 Position: 0]
Stack Trace: at System.Runtime.InteropServices.McgMarshal.ThrowOnExternalCallFailed(Int32, RuntimeTypeHandle) + 0x21
at __Interop.ComCallHelpers.Call(__ComObject, RuntimeTypeHandle, Int32, Type__Impl.UnsafeType, Void*, Void*) + 0xd5
at Windows.UI.Xaml.Controls.IFrame__Impl.Stubs.Navigate(__ComObject, Type, Object) + 0x8e
From 16299:
Exception: The text associated with this error code could not be found.
Cannot find a Resource with the Name/Key UseSystemFocusVisuals [Line: 0 Position: 0]
Type: Windows.UI.Xaml.Markup.XamlParseException
Stack trace: at System.Runtime.InteropServices.McgMarshal.ThrowOnExternalCallFailed(Int32, RuntimeTypeHandle) + 0x21
at __Interop.ComCallHelpers.Call(__ComObject, RuntimeTypeHandle, Int32, Type__Impl.UnsafeType, Void*, Void*) + 0xd5
at Windows.UI.Xaml.Controls.IFrame__Impl.Stubs.Navigate(__ComObject, Type, Object) + 0x8e
Could anyone shed some light on this?
{count} votes
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Nico Zhu (Shanghai Wicresoft Co,.Ltd.) 12,866 Reputation points2019-12-23T05:27:32.367+00:00 Cannot create instance of type 'Microsoft.Advertising.WinRT.UI.AdControl', from the first error, it looks
AdControlwas not create correctly, could you share your code or sample that could reproduce this issue ? -
Hong 1,216 Reputation points
2019-12-24T04:15:21.78+00:00 Those exceptions are from the app's analytics reported from users' computers. I will try to find a computer with an older version of Windows 10 to try to reproduce it and report back.
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Nico Zhu (Shanghai Wicresoft Co,.Ltd.) 12,866 Reputation points
2019-12-24T09:07:06.42+00:00 Great, if you have some new info, please insert it to the case update.
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2 answers
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(64, 0%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBW%3C/text%3E%3C/svg%3E)
Barry Wang 61 Reputation points2019-12-24T06:18:10.243+00:00 -
Hong 1,216 Reputation points
2019-12-24T13:27:53.813+00:00 There is no C# code. The AdControl is placed and configured in Xaml. Again it works flawlessly on Windows 10 18362, 18363.
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Hong 1,216 Reputation points
2019-12-25T04:05:19.417+00:00 There is no C# code involved. AdControl is placed in a Xaml file.
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Nico Zhu (Shanghai Wicresoft Co,.Ltd.) 12,866 Reputation points
2019-12-25T07:36:27.267+00:00 I test with blank and add the following code, it works well in 17763, I could not reproduce this issue.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 92%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERL%3C/text%3E%3C/svg%3E)
Roy Li - MSFT 33,506 Reputation points Microsoft Vendor2019-12-25T08:13:43.837+00:00 Hello,
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