getting property of non-object error

Severity: Notice --> Trying to get property of non-object



Here is the code






 

PHP Code:

function company_update($row)
{
    $userid=$this->session->userdata('userid');

    $query=$this->db->get_where('campaigns2',array('id'=>$row));

    $campaign = $row->company_division;

  //  $campaign = $row->company_division;
    $this->session->userdata('campaign')-> $campaign;   << line with error
    $this->db->set('campaign', $campaign);
    $this->db->where('email', $userid);
    $this->db->update('users'); 


This code seems to run fine on my windows apache and also on my AWS Lightsail server. Why would it be different on Ubuntu? I am thinking that I copied the campaigns2 table from the windows PC. Perhaps things got out of sync?

proof that an old dog can learn new tricks