total of items in the cart did not match the total of all items

I keep getting this error message when trying to process my transaction with paypal:

This transaction has been completed, but the total of items in the cart did not match the total of all items.

I can't find the problem in my code. Can you please help:

<?php

if (($_SERVER["REQUEST_METHOD"] == "POST") && (isset($_SERVER["HTTP_REFERER"]) && strpos(urldecode($_SERVER["HTTP_REFERER"]), urldecode($_SERVER["SERVER_NAME"].$_SERVER["PHP_SELF"])) > 0) && isset($_POST)) {
$PP_DirectPayment_required = array();
$PP_DirectPayment_required[0] = array();
$PP_DirectPayment_required[1] = array();
$PP_DirectPayment_itemized = array();
$PP_DirectPayment_itemized[0] = array();
$PP_DirectPayment_itemized[1] = array();
$PP_DirectPayment_optional = array();
$PP_DirectPayment_optional[0] = array();
$PP_DirectPayment_optional[1] = array();
$cartIndex = 0;
$nextIndex = 0;
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "Username";
$PP_DirectPayment_required[1][$nextIndex] = "xxxxxxx";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "Password";
$PP_DirectPayment_required[1][$nextIndex] = "xxxxxxx";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "Signature";
$PP_DirectPayment_required[1][$nextIndex] = "xxxxxxx";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "PaymentAction";
$PP_DirectPayment_required[1][$nextIndex] = "Sale";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "Currency";
$PP_DirectPayment_required[1][$nextIndex] = "".$CurrencyCode ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "IPAddress";
$PP_DirectPayment_required[1][$nextIndex] = "".$_SERVER["REMOTE_ADDR"] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "CreditCardType";
$PP_DirectPayment_required[1][$nextIndex] = "".$row_WAATKcustomers['cc_type'] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "CreditCardNumber";
$PP_DirectPayment_required[1][$nextIndex] = "".$row_WAATKcustomers['cc_number'] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "ExpMonth";
$PP_DirectPayment_required[1][$nextIndex] = "".$row_WAATKcustomers['exp_month'] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "ExpYear";
$PP_DirectPayment_required[1][$nextIndex] = "".$row_WAATKcustomers['exp_year'] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "FirstName";
$PP_DirectPayment_required[1][$nextIndex] = "".$row_WAATKcustomers['first_name'] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "LastName";
$PP_DirectPayment_required[1][$nextIndex] = "".$row_WAATKcustomers['last_name'] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "Street1";
$PP_DirectPayment_required[1][$nextIndex] = "".$row_WAATKcustomers['address1'] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "CityName";
$PP_DirectPayment_required[1][$nextIndex] = "".$row_WAATKcustomers['town_city'] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "StateOrProvince";
$PP_DirectPayment_required[1][$nextIndex] = "".$row_WAATKcustomers['county'] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "PostalCode";
$PP_DirectPayment_required[1][$nextIndex] = "".$row_WAATKcustomers['post_code'] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "Country";
$PP_DirectPayment_required[1][$nextIndex] = "".$row_rs_country_list['currency_code'] ."";
$nextIndex = count($PP_DirectPayment_required[0]);
$PP_DirectPayment_required[0][$nextIndex] = "UseSandbox";
$PP_DirectPayment_required[1][$nextIndex] = "true";

$PP_DirectPayment_itemized[0][0] = "OrderTotal";
$PP_DirectPayment_itemized[1][0] = "".number_format(round($GrandTotal,2), 2) ."";
$PP_DirectPayment_itemized[0][1] = "OrderDescription";
$PP_DirectPayment_itemized[1][1] = "";

while ( !$Tech8_Spares_eCart1->EOF() ) {

$nextIndex = count($PP_DirectPayment_itemized[0]);
$PP_DirectPayment_itemized[0][$nextIndex] = "Amount" . strval($cartIndex+1) . "";
$PP_DirectPayment_itemized[1][$nextIndex] = "".round($price,2) ."";
$nextIndex = count($PP_DirectPayment_itemized[0]);
$PP_DirectPayment_itemized[0][$nextIndex] = "Name" . strval($cartIndex+1) . "";
$PP_DirectPayment_itemized[1][$nextIndex] = "".$pname ."";
$nextIndex = count($PP_DirectPayment_itemized[0]);
$PP_DirectPayment_itemized[0][$nextIndex] = "Number" . strval($cartIndex+1) . "";
$PP_DirectPayment_itemized[1][$nextIndex] = "".$product_id ."";
$nextIndex = count($PP_DirectPayment_itemized[0]);
$PP_DirectPayment_itemized[0][$nextIndex] = "Quantity" . strval($cartIndex+1) . "";
$PP_DirectPayment_itemized[1][$nextIndex] = "".$qty ."";

$Tech8_Spares_eCart1->MoveNext();
$cartIndex ++;
}
$Tech8_Spares_eCart1->MoveFirst();

$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "MerchantSessionID";
$PP_DirectPayment_optional[1][$nextIndex] = "".session_id() ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "Payer";
$PP_DirectPayment_optional[1][$nextIndex] = "".$row_WAATKcustomers['email'] ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "Street2";
$PP_DirectPayment_optional[1][$nextIndex] = "".$row_WAATKcustomers['address1'] ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "Phone";
$PP_DirectPayment_optional[1][$nextIndex] = "".$row_WAATKcustomers['phone'] ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "CVV2";
$PP_DirectPayment_optional[1][$nextIndex] = "".$row_WAATKcustomers['cvv'] ."";

$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "ItemTotal";
$PP_DirectPayment_optional[1][$nextIndex] = "".number_format(round($SubTotal,2), 2) ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "ShippingTotal";
$PP_DirectPayment_optional[1][$nextIndex] = "".$delivery ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "HandlingTotal";
$PP_DirectPayment_optional[1][$nextIndex] = "".$charges - $discount ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "TaxTotal";
$PP_DirectPayment_optional[1][$nextIndex] = "".number_format(round($VAT,2), 2) ."";

$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "InvoiceID";
$PP_DirectPayment_optional[1][$nextIndex] = "".$order_id ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_Name";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["first_name_ship"]))?$_POST["first_name_ship"]:"") ." ".((isset($_POST["last_name_ship"]))?$_POST["last_name_ship"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_Street1";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["address1_ship"]))?$_POST["address1_ship"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_Street2";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["address2_ship"]))?$_POST["address2_ship"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_CityName";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["town_city_ship"]))?$_POST["town_city_ship"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_StateOrProvince";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["county_ship"]))?$_POST["county_ship"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_PostalCode";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["post_code_ship"]))?$_POST["post_code_ship"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_Country";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["country_ship_code"]))?$_POST["country_ship_code"]:"") ."";
$nextIndex = count($PP_DirectPayment_optional[0]);
$PP_DirectPayment_optional[0][$nextIndex] = "SH_Phone";
$PP_DirectPayment_optional[1][$nextIndex] = "".((isset($_POST["phone_ship"]))?$_POST["phone_ship"]:"") ."";

What is the version of DW and eCart that you are working with? I have seen an error similar to this one but it should be resolved with version 4.5.2 or higher of eCart. If you are getting this error with the latest releases it is something we will need to look into further. Please post back with the details so that we can determine how to proceed.

I am now using 5.0.1, but I may some of the ecart code may have been created by an earlier version of ecart. Can you tell me what files I need to check for you?

It would be a good idea to work on a copy of your site first since you have updated the cart. You should reapply the checkout server behaviors. You can either open up your checkout, confirm, and pp_confirm pages and update the individual PayPal checkout server behaviors on these pages or you can backup your current checkout pages into another folder and run the checkout wizard again to crate a new set of pages for you.

I would suggest just updating the server behaviors, it is less involved and should give you the correct result. The server behaviors that you will need to update are:

Express Checkout
Authentication for PayPal Express checkout (checkout page)
Get Payer Profile for Express Checkout (pp_confirm page)
Process Transaction with Express Checkout (pp_confirm page)

Direct Pay
eCar local checkout (PP_Direct_Payment) (confirm page)

You can just double click on them to edit, the setting should be fine but you should double check them along the way, then finish the server behavior to have it write out the newly updated files.