PHP Fatal error: Call to a member function fetch_assoc() on a non-object on line 19

This work with a die statement.  I put the die statement for testing.  But once I remove the die statement for it to continue processing, I get the php fatal error.  I tried to free the result set or close it, but it is still complaining.

See my code:

$mysqli = @new mysqli($db_host, $db_username, $db_password, $db_name);

$sql = "select * from table1";
$dataIndex = $mysqli->query($sql);

while ($result = $dataIndex->fetch_assoc())
{
      $field1 = $result['index_short_name']."_field1";
      $field2 = $result['index_short_name']."_field2";
      
      $sqlData = "select new_date, ".$field1.", ".$field2."  from table2";      
      $dataFund = $mysqli->query($sqlData);
      
      while ($row = $dataFund->fetch_assoc())
      {
            $line = "";
            $line .=  $row['new_date'].",".$row[$field1].",".$row[$field2]."\n";
            echo "<p>".$line."</p>";
            
      }
      die("here");
}

I replace the die("here") with $dataFund->close() and still error.