Cannot get fulfillmentPreview to work - says missing parameter [items]. However createFulfillmentOrder does work.

[nickgoodmanuk]

Hi, think may have found a possible bug. I'm using version 1.6.11.

When I try to call getFulfillmentPreview I get a failed response of Parameters missing [items]. However the createFulfillmentOrder call works and this is built up in a similar way.

Doesn't Work :

var fulfillmentpreviewresponse = amazonConnection.FulFillmentOutbound.GetFulfillmentPreview(fulfillmentpreviewrequest);

Works :

var createfulfillmentorderresponse = amazonConnection.FulFillmentOutbound.CreateFulfillmentOrder(createfulfillmentorderrequest);

I have noted the create fulfillment order response is just a boolean, which returns true. It has created the order on Amazon.

POST /fba/outbound/2020-07-01/fulfillmentOrders/preview Operation: getFulfillmentPreview

POST /fba/outbound/2020-07-01/fulfillmentOrders Operation: createFulfillmentOrder