DirectX debugging: Graphics Pipeline Stages: Input Assembler: “No mesh available for stage”

My question is basically why VS2012 tells me that there is no mesh available for the Input Assembler stage because if I click on the DeviceContext next to the Draw call in the Grahics Event List the Input layout is set correctly, the vertex buffers, too, the index buffer is NULL as I do not call DrawIndexed and the primitive topology is set correctly. My background color is drawn using g_pImmediateContext->ClearRenderTargetView( g_pRenderTargetView, Colors::MidnightBlue );. Only the mesh does not appear. What did I miss? If you need any code just ask. I'm just not sure which part might be helpful as it seems everything is set correctly and I want to avoid flooding this question with irrelevant code snippets.

If anything maybe this file which can be opened using VS2012 may help, it is the Graphics Experiment.vsglog file.

EDIT: Here is my InputLayout struct:

struct VERTEXPOSITIONCOLOR
{
    DirectX::XMFLOAT3   position;
    DirectX::XMFLOAT4   color;

    static D3D11_INPUT_ELEMENT_DESC* GetVertexLayout()
    {
        static D3D11_INPUT_ELEMENT_DESC layout[] =
        {
            { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT,
                0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0 },
            { "COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT,
                0, 12, D3D11_INPUT_PER_VERTEX_DATA, 0 },
        };
        return layout;
    }

    static UINT GetNumElements(){ return 2; }
};