paypal Express: The totals of the cart item amounts do not match order amounts.

仔细追踪，发现是
L_PAYMENTREQUEST_0_ITEMWEIGHTVALUE
L_PAYMENTREQUEST_0_ITEMWEIGHTUNIT'

计算出错，我的测试站没有这个计量，但是出来一个10，由于用不到，所以先注释掉这部分，临时用着，需要的时候再找原因：

vi catalog/model/payment/pp_express.php

$data['L_PAYMENTREQUEST_0_NAME' . $i] = $item['name'];
                          $data['L_PAYMENTREQUEST_0_NUMBER' . $i] = $item['model'];
                          $data['L_PAYMENTREQUEST_0_AMT' . $i] = $item_price;
                          $item_total += number_format($item_price * $item['quantity'], 2);
                          $data['L_PAYMENTREQUEST_0_QTY' . $i] = $item['quantity'];

                          $data['L_PAYMENTREQUEST_0_ITEMURL' . $i] = $this->url->link('product/product', 'product_id=' . $item['product_id']);

  /* if ($this->config->get('config_cart_weight')) {
                                  $weight = $this->weight->convert($item['weight'], $item['weight_class_id'], $this->config->get('config_weight_class_id'));
                                  $data['L_PAYMENTREQUEST_0_ITEMWEIGHTVALUE' . $i] = number_format($weight / $item['quantity'], 2);
                                  $data['L_PAYMENTREQUEST_0_ITEMWEIGHTUNIT' . $i] = $this->weight->getUnit($this->config->get('config_weight_class_id'));
                          }

                          if ($item['length'] > 0 || $item['width'] > 0 || $item['height'] > 0) {
                                  $unit = $this->length->getUnit($item['length_class_id']);
                                  $data['L_PAYMENTREQUEST_0_ITEMLENGTHVALUE' . $i] = $item['length'];
                                  $data['L_PAYMENTREQUEST_0_ITEMLENGTHUNIT' . $i] = $unit;
                                  $data['L_PAYMENTREQUEST_0_ITEMWIDTHVALUE' . $i] = $item['width'];
                                  $data['L_PAYMENTREQUEST_0_ITEMWIDTHUNIT' . $i] = $unit;
                                  $data['L_PAYMENTREQUEST_0_ITEMHEIGHTVALUE' . $i] = $item['height'];
                                  $data['L_PAYMENTREQUEST_0_ITEMHEIGHTUNIT' . $i] = $unit;
                          }
   */
                          $i++;

paypal The totals of the cart item amounts do not match order amounts.