A PHP Error was encountered

Severity: Notice

Message: Trying to get property 'exchange_rate_sell' of non-object

Filename: models/Currency_model.php

Line Number: 152

Backtrace:

File: /home/shoper/public_html/application/models/Currency_model.php
Line: 152
Function: _error_handler

File: /home/shoper/public_html/application/controllers/Home_controller.php
Line: 950
Function: get_exchange_rate

File: /home/shoper/public_html/index.php
Line: 328
Function: require_once