im header already sent problem

[eluser]sasori[/eluser]
is there a way to get rid of this error ?

Code:

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\myapp\system\application\models\stock_model.php:2)

Filename: codeigniter/Common.php

Line Number: 360