[FATAL] objectarray::objectarray[44] - first argument is not an array

array(6) {
  ["file"]=>
  string(49) "/home/ddc/ddc-www-2006-10-10/app/html/product.php"
  ["line"]=>
  int(44)
  ["function"]=>
  string(11) "objectarray"
  ["class"]=>
  string(11) "objectarray"
  ["type"]=>
  string(2) "->"
  ["args"]=>
  array(2) {
    [0]=>
    &NULL
    [1]=>
    &string(2) "id"
  }
}