Error: 404 API error product with reference [x]

When you use the merchant API to create shipments in ChannelEngine (this API is also used if you use our plugin for Woocommerce or Magento 1), you might encounter a 404 error with the message " A product with merchant reference [SOMETHING] could not be found in order".

{
"StatusCode":404,
"LogId":null,
"Success":false,
"Message":"A product with merchant reference 0 could not be found in order"
} 

This error message means that the shipment that is being exported to our API contains a shipment(line) for a product that is unknown on the original order. To clarify this with an example:

• A product is ordered with SKU / Merchant Product No 10 (this is always the value listed below the EAN).
  
• To ship this item, we must include the MerchantProductNo:
  

  { 	  
    "MerchantShipmentNo": "[SHIPMENT NUMBER]",
    "MerchantOrderNo": "[MERCHANT ORDER NUMBER]",
    "Lines": [ 	    
     { 	      
      "MerchantProductNo": "10",
      "Quantity": 1 	    
      } 	  
    ],
    "TrackTraceNo": "[TRACK & TRACE NUMBER]",
    "TrackTraceUrl": "", 	  
    "Method": "[SHIPMENT METHOD]"
  } 	

• If Lines on the shipment contain any other MerchantProductNo, say for example '9' or 'T-shirt', it cannot be matched with the original orderlines in ChannelEngine and the API returns the 404 error.

To resolve this, make sure that you ship exactly the same MerchantProductNo (/ SKU) on a shipment as was placed on the original orderlines.