pagination link error

[eluser]Unknown[/eluser]
hello,,
i'm a beginner in codeigniter..
i hv a problem in pagination link,,,th firstpage is working fine,, click on the ‘2’ on the pagination links,it will display errors like,,

Code:

A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 0

Filename: views/viewbid.php

A PHP Error was encountered

Severity: Notice

Message: Trying to get property of non-object

Filename: views/viewbid.php

controller

Code:

function viewbid($row=0)
{
  $ids = $_POST['id'];
  $data['profile']=$this->buyermodel->get_ads($ids);
  $config['base_url'] = 'http://url/n/buyer/viewbid/';
  $config['total_rows'] =$this->buyermodel->getNumAds();
  $config['per_page'] = 3;
  $config['uri_segment'] = 4;
  
  $this->pagination->initialize($config);
  
  $data['test']=$this->buyermodel->bid_data($ids,$row);
  $data['links']= $this->pagination->create_links();
  $this->load->view('viewbid',$data);
}

If more details are needed then I can give them. Hopefully someone can help me.

Thank You!