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           NVIDIA Nsight Visual Studio Edition - CUDA Debugger
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The application being debugged with the Nsight CUDA debugger, was unable to
find any associated source. This could be for a number of reasons:

1) CUDA has not been initialized.
Make sure cuInit has been called, and it returned a successful result.

2) No CUDA contexts have been created.
Once a context is created, memory can be examined in the context. Each context
shows up as a single "Thread" in the Visual Studio Threads view. (Debug | Windows | Threads)

3) There are no active CUDA grids in any context.
A grid must be launched in order to hit breakpoints.

4) You have selected the "Default Context" in the Visual Studio Threads view.
This context is a placeholder shown when there are no available actual CUDA 
contexts. It does not show real data.

5) No CUDA modules have been loaded.
You can see which modules are loaded in each CUDA context by showing the 
Visual Studio Modules view. (Debug | Windows | Modules)

6) Symbolics were not found for the loaded .cubin.
The module needs to be built with debug information. Please specify the
-G0 switch when building.

7) A grid launch failed while running a kernel.