I’ve started getting the message “Performance Warning: Backing up device or system memory to file. Replay may be very slow.”, and then the profiler fails to launch any kernels when I profile a lattice boltzmann solver on larger domains using Nsight VS edition. The code still runs just fine when not profiling. I’m using v3.1 of Nsight VS edition, 5.5.11 of the tootlkit for windows 7/8 64-bit and the driver version is 320.20. Could it just be too much memory allocated to run all of the “profile cuda application” tests?