CUDA Nbody.exe file runtime error 13

I have carefully followed the installation steps laid out in http://docs.nvidia.com/cuda/cuda-quick-start-guide/index.html#windows-network
However, when I try to run nbody.exe, it gives me the following error: CUDA error at c:\programdata\nvidia corporation\cuda samples\v9.1\5_simulations\nbody\bodysystemcuda_impl.h:281 code=13(cudaErrorInvalidSymbol) “setSofteningSquared(softeningSq)”

I am using Windows 10, and a GeForce 610 graphics card.

Does anyone have any idea why this might be?

GeForce 610 is a Fermi (compute capability 2.x) GPU. CUDA 9.1 does not support that GPU. The most recent CUDA version supporting that GPU is CUDA 8.