I am using csv parser to read csv file and passing received data of csv file to ejs template file to print so the data is in object format, so I have used stringyfy but getting error due to this.

Error:

Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client:

Node js code

app.get('/', function (req, res, next) {
    fs.createReadStream('./Employee.csv')
        .pipe(csv())
        .on('data', function (rows) {
            try {
            var ParsedData=  data:JSON.stringify(rows);
                 res.render('Emp_details',{data:ParsedData});
            }
            catch (err) {
                //error handler
            }
        })
        .on('end', function () {
            //some final operation
        });


});

Code to print data in ejs template file:

<% for(var i = 1; i<= data1.length; i++) { %>
         <%=i %>
       <% } %>