Nvidia GeForce GTX 960M
Short description of error
Pressing CTRL + Z to go into viewport render with GPU Rendering and Branched Path Tracing enabled causes a CUDA crash. Doing the same thing with 'Sampling' set to 'Path Tracing' instead of 'Branched Path Tracing and the rendering takes off without a problem.
Output from System Console:
CUDA error: Launch failed in cuCtxSynchronize()
Exact steps for others to reproduce the error
Blender file being executed is the free version of the Cycles Skin Shader by Matthew Heimlich mhSkin.zip