cudaGraphicsResourceGetMappedPointer returns "unknown error"
I am creating an OpenGL texture like this:

    glGenTextures( 1, &board );
    glBindTexture( GL_TEXTURE_2D, board );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
    glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA32F, width, height, 0, GL_RGBA, GL_FLOAT, NULL);

I get a handle at `board` so I assume the texture's been successfully created. I want to share this texture with CUDA so I register and map the resource:

    cudaGLSetGLDevice(0);
    cudaGraphicsGLRegisterImage( &boardImage, boardTex, GL_TEXTURE_2D, cudaGraphicsMapFlagsNone );
    cudaGraphicsMapResources( 1, &boardImage, 0 );

Then I try to get the mapped pointer like this:

    float4* mappedPointer;
    size_t mappedSize;
    cudaGraphicsResourceGetMappedPointer( (void**)&mappedPointer, &mappedSize, boardImage );

Unfortunately this call returns an error and refuses to work. I made sure the texture wasn't bound in OpenGL context just in case. Still not working. `cudaGetErrorString` yields *"unknown error"* so I'm pretty stuck here. I'd appreciate any ideas.
cudaGraphicsResourceGetMappedPointer returns "unknown error"
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I am creating an OpenGL texture like this:

    glGenTextures( 1, &board );
    glBindTexture( GL_TEXTURE_2D, board );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
    glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA32F, width, height, 0, GL_RGBA, GL_FLOAT, NULL);

I get a handle at `board` so I assume the texture's been successfully created. I want to share this texture with CUDA so I register and map the resource:

    cudaGLSetGLDevice(0);
    cudaGraphicsGLRegisterImage( &boardImage, boardTex, GL_TEXTURE_2D, cudaGraphicsMapFlagsNone );
    cudaGraphicsMapResources( 1, &boardImage, 0 );

Then I try to get the mapped pointer like this:

    float4* mappedPointer;
    size_t mappedSize;
    cudaGraphicsResourceGetMappedPointer( (void**)&mappedPointer, &mappedSize, boardImage );

Unfortunately this call returns an error and refuses to work. I made sure the texture wasn't bound in OpenGL context just in case. Still not working. `cudaGetErrorString` yields *"unknown error"* so I'm pretty stuck here. I'd appreciate any ideas.