access violation on rtcGetBufferData()

[stefano-m5]

Hi, I am new to embree and I am trying to code my first test program on VS plain C with embree 4.3 on windows.
I am defining a simple geometry with the following:

RTCBuffer vertexBuffer = rtcSetNewGeometryBuffer(mesh, RTC_BUFFER_TYPE_VERTEX, 0, RTC_FORMAT_FLOAT3, sizeof(float) * 3 ,3 * pointn);

LPVOID pbuf = rtcGetBufferData(vertexBuffer);

and I am getting an access violation on rtcGetBufferData(). What am I doing wrong?