I have been fiddeling with your chart now for some days, and it works well!
Somewhere in the process I ran into an issue where in the designer-mode of Visual Studio 2013 and Blend 12 i cannot see the chart, but get this error:
----
COMException: Error HRESULT E_FAIL has been returned from a call to a COM component.
StackTrace
at System.Runtime.InteropServices.WindowsRuntime.IVector`1.InsertAt(UInt32 index, T value)
at System.Runtime.InteropServices.WindowsRuntime.VectorToListAdapter.InsertAtHelper[T](IVector`1 _this, UInt32 index, T item)
at System.Runtime.InteropServices.WindowsRuntime.VectorToListAdapter.Insert[T](Int32 index, T item)
InnerException: None
----
I tried stripping things out of the code, and ended up with:
<telerikChart:RadCartesianChart>
</telerikChart:RadCartesianChart>
And still the same error, even after Cleaning and Rebuilding the solution! If I remove the above, the error dissapears.
In my project I reference these libs:
Telerik.Core
Telerik.UI.Xaml.Chart
Telerik.UI.Xaml.Grid
Telerik.UI.Xaml.Input
Telerik.UI.Xaml.Primitives
Have you seen anything like this before?
Best regards,
Erik
13 Answers, 1 is accepted
Thank you for contacting us.
So far we do not have any known issues. Could you please send us the project and we will test it on our side.
I am looking forward to your reply.
Regards,
Ivaylo Gergov
Telerik
Check out the new Telerik Platform - the only modular platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native apps. Register for the free online keynote and webinar to learn more about the Platform on Wednesday, February 12, 2014 at 11:00 a.m. ET (8:00 a.m. PT).

Regards Erik
Could you please try to manually delete the obj folder from project folder and see if this solves the problem?
Regards,
Ivaylo Gergov
Telerik
Check out the new Telerik Platform - the only modular platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native apps. Register for the free online keynote and webinar to learn more about the Platform on Wednesday, February 12, 2014 at 11:00 a.m. ET (8:00 a.m. PT).

Thanks, but unfourtunately no.
Some more information about the project:
The chart is inside a Page in a Windows Store Class Library project, and referenced into the main Windows Store App project. Prism is used for MVVM.
Regards,
Erik
Thank you for your cooperation.
Using the provided setup I was able to reproduce the exception of the VS Designer and we will further investigate what could be the reason.
Meanwhile, if the designer plays an important role in your development process, as a temporary workaround when you want to use the VS Designer you can unload the project that contains a reference to the class library.
I will contact you as soon as we have additional information regarding this matter. I have also update your Telerik points as a token of gratitude for bringing this issue to our attention.
Regards,
Ivaylo Gergov
Telerik
Check out the new Telerik Platform - the only modular platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native apps. Register for the free online keynote and webinar to learn more about the Platform on Wednesday, February 12, 2014 at 11:00 a.m. ET (8:00 a.m. PT).

Thanks a lot. I'll use that work around for the time being.
Best regards,
Erik

I am also getting exact same error message.
-Nikhil
The issue is still present and so far we could not determine if the problem is in our component or in the VS Designer.
Regards,
Ivaylo Gergov
Telerik
Check out the new Telerik Platform - the only modular platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native apps. Register for the free online keynote and webinar to learn more about the Platform on Wednesday, February 12, 2014 at 11:00 a.m. ET (8:00 a.m. PT).

We investigated this issue but we could not determine the reason for it. We strongly believe that the problem comes from the VS designer so for now the issue stays unresolved.
Please, let me know should you have any other questions.
Regards,
Ivaylo Gergov
Telerik
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

We have tested such scenario with the MS controls and the designer still breaks. However, I was able to think of a workaround. You can try to reference the UI for Windows 8.1 SDK both in the class library and in the application.
I hope this works for you.
Regards,
Ivaylo Gergov
Telerik
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

Thanks for that. I managed to get past the issue by running VS as Admin. I assumed that I'd need to continue as Admin but for the purposes of letting you know I have just run VS with normal rights and it works so hopefully it was simply that VS needed to run as admin in order to setup the system.
Now to solve the other .Net 4.5.1 issues and I can then upgrade my application fully!
Regards
Jon