Call to undefined function executeNonQuery ()

I have this code that is part of a function in php to change status , previously everything worked perfect, but now when changing status , mark error in:

$result = $connection >executeNonQuery($query,array($_POST['numFile']));

The error says that:

    <b>Fatal error</b>:  Uncaught Error: Call to undefined function executeNonQuery() in C:\xampp\htdocs\aaa\aaa\aaa.php:620
Stack trace:
#0 {main}
  thrown in <b>C:\xampp\htdocs\aaa\aaa\aaa.php</b> on line <b>620</b><br /> 

This is the part of the code where the error is generated.

  $connection = new MySqlServerConnection();
    $query1 = 'SELECT quantity, reorder_Level FROM inventory_list WHERE numFile = ?';
    $result1 = $connection->executeQuery($query1,array($_POST['numFile']));

        if (intval($result1[0][0]) <= intval($result1[0][1]) && intval($result1[0][0])  == 0)
        {
          $query = 'UPDATE inventory_list SET status = 3 WHERE  numFile = ?';
          $result = $connection >executeNonQuery($query,array($_POST['numFile']));
        }
        else
        {

        $query = 'UPDATE inventory_list SET status = 0 WHERE  numFile = ?';
        $result = $connection->executeNonQuery($query,array($_POST['numFile']));
                }