We use nsight for developing at our studio, however our graphics team encounters the same issue where Nsight crashes close to 80-90% during a second capture, with the probability increasing the more captures are taken.
I have a feeling that the visual studio process may be running out of memory, attaching a debugger causes it to detach immediately without hitting any exception violation / crash dump.
Nsight might be leaking a lot of resources when a capture is resumed? This problem may not show up unless the application is gpu intensive. The application is using DirectX 11 on Windows 7, 64bit.
Installed Physical Memory (RAM) 16.0 GB
Total Physical Memory 15.9 GB
Adapter Description NVIDIA GeForce GTX 650 Ti
Adapter RAM 1.00 GB (1,073,741,824 bytes)