Revit API Visual Studio error/warnings

[negi.dushyant]

I am trying to create a simple "Hello World " add in refering to a few web tutorials .But getting following errors and warnings in Visual Studio.

-CS0012 C# The type is defined in an assembly that is not referenced

-Warning    MSB3270    There was a mismatch between the processor architecture of the project being built "MSIL" and the processor architecture of the reference "RevitAPI", "AMD64"

[jeremytammik · Accepted solution]

Welcome to the Revit API!

The warning is normal and expected and can be ignored.

The error is more serious and due to a mistake on your part.

Please follow the instructions given in the hello world tutorials in the developer guide:

http://help.autodesk.com/view/RVT/2018/ENU/?guid=GUID-93BC4416-FA94-44B3-AA66-931839DA44B4

For more information, please refer to the rest of the getting started material:

http://thebuildingcoder.typepad.com/blog/about-the-author.html#2

Good luck and have fun!

Cheers,

Jeremy