Fatal Error - Call to a member function

[amyleew]

I have been setting up gift certificates today but now I have this error message in Modules > Order Total

Fatal error: Call to a member function format() on a non-object in /home/mydatabase/public_html/includes/modules/order_total/ot_gv.php on line 49

I don't even remember opening this .php file and I have no idea how to fix it. Can anyone help, please?

[BlindSide]

That error doesn't match up with the latest version of Zen Cart, so what version are you running?

[clueless_in_berlin]

Hi, I have the exact same error message. I am running 1.3.8a german/english version. When I open up the mentioned file, I find this starting on line 48:

 if (!zen_not_null(ltrim($_SESSION['cot_gv'], ' 0')) || $_SESSION['cot_gv'] == '0') $_SESSION['cot_gv'] = '0.00';
    $this->checkbox = $this->user_prompt . '<input type="text" size="6" onkeyup="submitFunction()" name="cot_gv" value="' . number_format($_SESSION['cot_gv'], 2) . '" onfocus="if (this.value == \'' . number_format($_SESSION['cot_gv'], 2) . '\') this.value = \'\';" />' . ($this->user_has_gv_account($_SESSION['customer_id']) > 0 ? '<br />' . MODULE_ORDER_TOTAL_GV_USER_BALANCE . $currencies->format($this->user_has_gv_account($_SESSION['customer_id'])) : '');
    $this->output = array();
    if (IS_ADMIN_FLAG === true) {
      if ($this->include_tax == 'true' && $this->calculate_tax != "None") {
        $this->title .= '<span class="alert">' . MODULE_ORDER_TOTAL_GV_INCLUDE_ERROR . '</span>';

I have no idea what this means. Any help would be greatly appreciated.