Reading from RWTexture2D<float2> in compute shader

Question

Hi all,

Below is my code:

RWTexture2D<float> tex1 : register(u0);
RWTexture2D<float2> tex2: register(u1);

[numthreads(16, 16, 1)]
void main( uint3 DTid : SV_DispatchThreadID )
{
    float a;
    float2 b;
    a = tex1[DTid.xy];        //OK
    b = tex2[DTid.xy];        //Error
}

HLSL compiler returns an error "typed UAV loads are only allowed for single-component 32-bit element types".

Does anyone know how to read data from RWTexture2D<float2> in compute shader v5.0?