CiviCRM Community Forums (archive)

This is the first time that I have tried using CiviMail on a site that was set up by someone else, and when I got to step 6 to send the mail immediately I got... "Sorry. A non-recoverable error has occurred." and I obtained a backtrace.....
/public_html/sites/all/modules/civicrm/CRM/Core/Error.php, backtrace, 270
/public_html/sites/all/modules/civicrm/CRM/Core/DAO.php, fatal, 709
/public_html/sites/all/modules/civicrm/CRM/Contact/Form/Search.php, getFieldValue, 374
/public_html/sites/all/modules/civicrm/CRM/Contact/Form/Search/Basic.php, buildQuickForm, 127
/public_html/sites/all/modules/civicrm/CRM/Core/Form.php, buildQuickForm, 326
/public_html/sites/all/modules/civicrm/CRM/Core/QuickForm/Action/Display.php, buildForm, 99
/public_html/sites/all/modules/civicrm/packages/HTML/QuickForm/Controller.php, perform, 203
/public_html/sites/all/modules/civicrm/packages/HTML/QuickForm/Page.php, handle, 103
/public_html/sites/all/modules/civicrm/CRM/Core/Controller.php, handle, 284
/public_html/sites/all/modules/civicrm/CRM/Core/Invoke.php, run, 219
/public_html/sites/all/modules/civicrm/drupal/civicrm.module, invoke, 356
, civicrm_invoke,
/public_html/includes/menu.inc, call_user_func_array, 348
/public_html/index.php, menu_execute_active_handler, 18

Can anyone help please?
I am using Drupal 6.19 and CiviCRM 3.3.1

Thanks,
Mark