CBSubs GPL with eWAY

We have been using CBSubs with eWay for several years and have just upgraded to CBSubs GPL. All seems fine except the eWAY payment gateway.

Processing a new (test) subscription proceeds normally:
Registration - Payment (select eWAY) - eWAY Payment - Pay Now - Processing - Finalise - Returns to our site with error message:

Please contact site administrator to check error log.
No suitable basket found.

Logging into site admin - CBSubs observe the following:
In CBSubs
Subscriptions
Subscription record created with status Registered - Unpaid

Baskets
Basket created but payment not processed and no gateway account shown.

Payments
No payment record created

Error Log
eway: MerchantReference is missing in the transaction result: <TransactionResponse><AuthCode>R55272</AuthCode><ResponseCode>08</ResponseCode><ReturnAmount>55.00</ReturnAmount><TrxnNumber>107437826</TrxnNumber><TrxnStatus>True</TrxnStatus><TrxnResponseMessage>Honour With Identification</TrxnResponseMessage><MerchantOption1>AUD</MerchantOption1><MerchantOption2></MerchantOption2><MerchantOption3></MerchantOption3><MerchantReference>N256861787265281</MerchantReference><MerchantInvoice>550</MerchantInvoice><ErrorMessage></ErrorMessage></TransactionResponse> . Parsed result: Array of request: au.ewaygateway.com/Result/?CustomerID=16749336&UserName=secretary%40asperger.asn.au&AccessPaymentCode=60CF33ZqfvIfK8t5g37n_qD4EjjPfFaEku6u4ZK2kfLfzQ3FKdln3umLVTgWmDSHJk0kSN-izXruUZDv-WJ4mI-z6NjB2JblEPn-ul8h3sJusWS3pxgBBKyxQprNfGMDmy1zrNIOMmm9pc1L2V2bpHZEmBg%3D%3D : Please contact site administrator to check error log.

In eWAY
Payment shown as completed with no apparent errors.

Would appreciate advise on how to diagnose any setup problems.

Cheers,

would really appreciate some help with this if anybody has any ideas?

MerchantReference is supposed to be the basket id. It's set as basket id within _getBasicRequstParams of the gateway. However, your response data seams to have set the InvoiceID to the MerchantReference, which is not correct and will result in the (int) typecasting converting it to 0 (as it has alpha characters in the invoice id), which results in your error. It would appear the basket id is being set to MerchantInvoice. So for some reason those 2 are reversed. Was the gateway modified in any way? Please review the below.

IN: components/com_comprofiler/plugin/user/plug_cbpaidsubscriptions/processors/eway/cbpaidsubscriptions.eway.php
ON: Lines 479 - 480
You should see the above within the gateways source. If not then please re-download and re-install the gateway to ensure it's up to date and has not been modified.

Thanks for your reply Kyle. I have been out of town for a few weeks in a remote location with a very unreliable internet connection so have been unable to follow this up until now.

I have checked the file you referred to. Lines 479 - 480 are the same as your example (see below, copied from my version of the file). Nothing has been changed, it was a straightforward update from the previous version. I never dabble with code, it's right outside my scope.

Still unable to process transactions with the new CBSubs eWay payment gateway.
Any further help available?
Is anyone else using this successfully?

It's not working, because eWay is swapping MerchantReference and MerchantInvoice for some reason. Please contact eWay and see why they're swapping those two being sent to them. I'm not sure what to advise as that's very strange behavior on the gateways part.