Access violation when initializing a D3DBuffer - c++11

Question

I'm trying to load an obj file full of vertices and render it as a point cloud.
when I try to run my code it crashes and gives me the following error:
Unhandled exception at 0x66463E50 (nvwgf2um.dll) in Tutorial06.exe: 0xC0000005: Access violation reading location 0x00E9D000.
I followed the tutorial code Microsoft provide with DirectX and changed it to suite my layout and everything but I must have done something wrong and I'm not sure what it is.
This is how I try to initialize my buffer:
CloudLoader::getInstance().loadCloudData("cloud.obj");
std::vector<CloudVertex>* data = CloudLoader::getInstance().getCloudData();
D3D11_BUFFER_DESC bd;
ZeroMemory( &bd, sizeof(bd) );
bd.Usage = D3D11_USAGE_DEFAULT;
bd.ByteWidth = sizeof( CloudVertex ) * data->size();
bd.BindFlags = D3D11_BIND_VERTEX_BUFFER;
bd.CPUAccessFlags = 0;
D3D11_SUBRESOURCE_DATA InitData;
ZeroMemory( &InitData, sizeof(InitData) );
InitData.pSysMem = data;
hr = g_pd3dDevice->CreateBuffer( &bd, &InitData, &g_pVertexBuffer );
And this my cloud loading code:
void CloudLoader::loadCloudData(std::string fileName)
{
if (m_loaded == false){
m_loadedData = new std::vector<CloudVertex>();
std::wifstream fileIn(fileName.c_str()); //Open file
wchar_t checkChar;
if (fileIn){
while (fileIn){
checkChar = fileIn.get(); //Get next char
switch (checkChar){
case 'v':
checkChar = fileIn.get();
if (checkChar == ' ') //v - vert position
{
float vz, vy, vx;
fileIn >> vx >> vy >> vz; //Store the next three types
m_loadedData->push_back(CloudVertex(vx, vy, vz));
}
break;
}
}
}
}
m_loaded = true;
}
I guess its a C++ thing and not directX and its probably really simple but I've been stuck on this for a while now, I would really appreciate the help.

Answer 1

pSysMem cannot point at "data", as this is a pointer to the std::vector class and not actually the data contained within the vector.
Try:
InitData.pSysMem = data->data();