Revit can't run the external application

[oakam430373]

Hi,
I am new to Revit programming and I tried to use the Software Development Kit , API developer guide. I can only run the first addin HelloWorld. The other examples
won't run. I get the following error message when I start revit:
Revit can't rutn the external application. Contact the provider....
When I open details I can see that the error :
System.TypeLoadException

I copied everthing from tutorial, What is it that go wrong?

Thanks

[gsalazar]

I am having the same problem. Has Anyone figured this out yet?

Thanks

[Duncan Lithgow]

Giv mig et link til den vejledning du prøver at følger. Det er ikke altid noget de opdatere fra år til år, og APIen er i rivende udvikling.