Help me about "error C2064: term does not evaluate to a function taking 1 arguments"

I don't know how to fix this error, help me please

#define SC_INCLUDE_DYNAMIC_PROCESSES

#include "systemc"
using namespace sc_core;
using namespace sc_dt;
using namespace std;

#include "tlm.h"
#include "tlm_utils/simple_initiator_socket.h"
#include "tlm_utils/simple_target_socket.h"
#include "Initiator.h"
#include "Router.h"
#include "Memory.h"

int sc_main(int argc, char* argv[])
{
  Initiator* initiator;
  Router<4>* router;
  Memory*    memory[4];

  initiator = new Initiator("initiator");
  router    = new Router<4>("router");
    for (int i = 0; i < 4; i++)
    {
      char txt[20];
      sprintf(txt, "memory_%d", i);
      memory[i]   = new Memory(txt);
    }

    // Bind sockets
    initiator->socket.bind( router->target_socket );
    for (int i = 0; i < 4; i++) 
		router->initiator_socket[i]->bind( memory[i]->socket );

	sc_time t(100, SC_PS);

  sc_signal<bool> a,b,c;
  sc_signal<int> d;

  initiator->a(a);
  initiator->b(b);
  initiator->c(c);

  memory[0]->d(d);

  sc_trace_file *wf= sc_create_vcd_trace_file("and2");
  sc_trace(wf, initiator->a, "a");
  sc_trace(wf, initiator->b, "b");
  sc_trace(wf, initiator->c, "c");
  sc_trace(wf, memory[0]->d, "d");

  a.write(0);
  b.write(0);

  sc_start(t);
  a.write(0);
  b.write(1);

  sc_start(t);
  a.write(1);
  b.write(0);

  sc_start(t);
  a.write(1);
  b.write(1);

  sc_start(t);
  a.write(0);
  b.write(0);

  sc_start(t);
  sc_stop();

  sc_close_vcd_trace_file(wf);
  return 0;
}

it's error in this lines

memory[0]->d(d);
sc_trace(wf, memory[0]->d, "d");