AMGX_solver_solve_with_0_initial_guess() requires explicit initializing of solution vector

{ AMGX_matrix_handle A1; AMGX_vector_handle rhs; AMGX_vector_handle sln;

        AMGX_matrix_create(&A1, rsrc, AMGX_mode_dDDI);
        AMGX_vector_create(&rhs, rsrc, AMGX_mode_dDDI);
        AMGX_vector_create(&sln, rsrc, AMGX_mode_dDDI);

        double data[] = {1, -2, -3, 1, 1, -4, -5, 1};
        AMGX_pin_memory(data, sizeof(double) * 8);
        int col_ind[] = {0, 1};
        int row_ptr[] = {0, 1, 2};
        AMGX_matrix_upload_all(A1, 2, 2, 2, 2, row_ptr, col_ind, data, 0);
        int nn, block_dimx, block_dimy;
        AMGX_matrix_get_size(A1, &nn, &block_dimx, &block_dimy);
        double data1[] = {1, 2, 3, 4};
        AMGX_pin_memory(data1, sizeof(double) * 4);
        AMGX_vector_upload(rhs, 2, 2, data1);
        int nnn, block_dim;
        AMGX_vector_get_size(rhs, &nnn, &block_dim);
        //AMGX_vector_create(x1, )
        AMGX_solver_create(&solver, rsrc, AMGX_mode_dDDI, config);
        AMGX_solver_setup(solver, A1);
        AMGX_solver_solve_with_0_initial_guess(solver, rhs, sln);
    }

Good afternoon. Please tell me why in this example I get an error of mismatch of dimensions? Purely in blocks everything turns out correctly. I use the solver FGMRES. Maybe there is a working example in which the matrix and vector are initialized from arrays, and not from a file. The documentation seems to be doing everything right.