cannot send std::vector using MPI_Send and MPI_Recv

I am trying to send std:vector using MPI send and recv functions but I have reached no where. I get errors like

Fatal error in MPI_Recv: Invalid buffer pointer, error stack:
MPI_Recv(186): MPI_Recv(buf=(nil), count=2, MPI_INT, src=0, tag=0, MPI_COMM_WORLD, status=0x7fff9e5e0c80) failed
MPI_Recv(124): Null buffer pointer

I tried multiple combinations

A) like what used to send arrays ..

 std::vector<uint32_t> m_image_data2; // definition of  m_image_data2
     m_image_data2.push_back(1);
     m_image_data2.push_back(2);
     m_image_data2.push_back(3);
     m_image_data2.push_back(4);
     m_image_data2.push_back(5);

MPI_Send( &m_image_data2[0], 2, MPI_INT, 1, 0, MPI_COMM_WORLD);
MPI_Send( &m_image_data2[2], 2, MPI_INT, 1, 0, MPI_COMM_WORLD);

MPI_Recv( &m_image_data2[0], 2, MPI_INT, 0, 0, MPI_COMM_WORLD, &status );

B) without []

MPI_Send( &m_image_data2, 2, MPI_INT, 1, 0, MPI_COMM_WORLD);
MPI_Send( &m_image_data2 + 2, 2, MPI_INT, 1, 0, MPI_COMM_WORLD);

MPI_Recv( &m_image_data2, 2, MPI_INT, 0, 0, MPI_COMM_WORLD, &status );

C) using vector methods like at()..

MPI_Send( &m_image_data2.at(0), 2, MPI_INT, 1, 0, MPI_COMM_WORLD);
MPI_Send( &m_image_data2.at(2), 2, MPI_INT, 1, 0, MPI_COMM_WORLD);

MPI_Recv( &m_image_data2.at(0), 2, MPI_INT, 0, 0, MPI_COMM_WORLD, &status );

I am thinking of converting vector to int[] at master node then convert it back to vector in worker node but it will unnecessary overhead.

Does anyone know how to solve it?