Error Trying to Draw Sphere using a vbo OpenGL - c++

Question

I am trying to draw a sphere but I keep getting a
Thread 1: EXC_BAD_ACCESS (code=1, address=0x0
error on this line:
glGenBuffers(1, &ballVbo);
I am not exactly sure what this means.
Here is my code below:
int main(int argc, char *argv[]) {
std::vector<GLfloat> ballVerts;
GLuint ballVbo;
for(int i = 0; i <= 40; i++)
{
double lat0 = M_PI * (-0.5 + (double) (i - 1) / 40);
double z0 = sin(lat0);
double zr0 = cos(lat0);
double lat1 = M_PI * (-0.5 + (double) i / 40);
double z1 = sin(lat1);
double zr1 = cos(lat1);
for(int j = 0; j <= 40; j++)
{
double lng = 2 * M_PI * (double) (j - 1) / 40;
double x = cos(lng);
double y = sin(lng);
ballVerts.push_back(x * zr0); //X
ballVerts.push_back(y * zr0); //Y
ballVerts.push_back(z0); //Z
ballVerts.push_back(0.0f);
ballVerts.push_back(1.0f);
ballVerts.push_back(0.0f);
ballVerts.push_back(1.0f); //R,G,B,A
ballVerts.push_back(x * zr1); //X
ballVerts.push_back(y * zr1); //Y
ballVerts.push_back(z1); //Z
ballVerts.push_back(0.0f);
ballVerts.push_back(1.0f);
ballVerts.push_back(0.0f);
ballVerts.push_back(1.0f); //R,G,B,A
}
}
glGenBuffers(1, &ballVbo);
glBindBuffer(GL_VERTEX_ARRAY, ballVbo);
GLuint sphereSize = 3200*7*4; //3200 vertixes * 7 floats
glBufferData(GL_VERTEX_ARRAY,sphereSize, &ballVerts[0], GL_STATIC_DRAW);
//Draw a ball
glBindBuffer(GL_VERTEX_ARRAY, ballVbo);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, 7*4, 0);
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(4, GL_FLOAT, 7*4, (void*)(3*4));
glDrawArrays(GL_TRIANGLE_STRIP, 0, 3200);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}