Compile error :: no global operator found which takes type 'std::string'

#include <fstream>
#include <iostream>
#include <iomanip>
#include <cmath>
#include <string>

using namespace std;

const int MAX_COMP = 50;
const int MAX_MANU = 50;
const int MAX_PRICE = 50;

struct Computer
{
	string Model;
	string Manu;
	int Price;
	string ARRAY1[100];
	string ARRAY2[100];
	int ARRAY3[100];
		
};
struct Database
{
Computer DB[MAX_COMP][MAX_MANU][MAX_PRICE];
};

void getComputer(Computer&, ifstream&, ofstream&, Database&);

//void sortComputer(int ARRAY3[], int size);

int main()
{
	Computer data;
	Database base;
	
	ifstream iFile;
	ofstream oFile;
	iFile.open("CompSys.txt");
	oFile.open("CompLog.txt");


	getComputer(data, iFile, oFile, base);
	
	iFile.close();
	oFile.close();
	return 0;


}

void getComputer(Computer& data, ifstream& iFile, ofstream& oFile, Database& base)
{

	int Idx = 0;
	
	while(!iFile.eof()&& Idx<100)
	{
		
	getline(iFile, data.Model, '\t');
	data.ARRAY1[Idx] = data.Model;
	
	getline(iFile, data.Manu, '\t');
	data.ARRAY2[Idx] = data.Manu;

	iFile >> data.Price;
	data.ARRAY3[Idx] = data.Price;

	Idx++;

	base.DB[data.ARRAY1[Idx]][data.ARRAY2[Idx]][data.ARRAY3[Idx]]; //Line # 71

	}
	
	

	cout<<data.ARRAY1[0]<<" "<<data.ARRAY2[0]<<" "<<data.ARRAY3[0];
	
}