compileter do not recognise the __syncthreads() in CUDA 5.5

Accelerated Computing CUDA CUDA Programming and Performance
1

Hello!!! I install on my computer MS VS 2012 and SDK CUDA 5.5. Computer’s OS is WIN 7 32 bit. I create the simple program which add the small 2 massives. It’s OK. But when I use __syncthreads() in kernel functions than compileter gives me error. Why? Please help me.

2

Is this compiler giving this information, meaning when You try to compile Your code You get error message? Or is it intellisense, underlining with red wavy line the calls of __syncthreads()?

Cheers,
MK

3

Which error message do you receive?

4

Make sure your CUDA code is a file with a .cu file name extension.