New Visual Profiler won't generate Timeline

I’ve just installed v4.1 of the the Visual Profiler, attempted to profile one of my applications (that I know runs and works in previous versions of the profiler) but it won’t generate a timeline, so I can’t do any other analysis. I’m using a Quadro 6000 for CUDA and an old 8400GS to run my monitors. Any suggestions?

Can you give some details on the platform you are running on (win, linux, mac) and on how you are running nvvp. The problem may be that the Visual Profiler cannot locate a dll that it needs to generate the timeline.