GOP is not providing recommendation for PTO Model item

Summary:

I have created PTO Model structure in fusion, PTO model has ATO model and some optional accessories. When i create order for ATO model alone, GOP is providing recommendations for Make and work order is getting created and closed.

But when i am creating order for PTO model along with ATO model and some accessory items, I am seeing that GOP is not providing any recommendations for ATO model and fulfilment line status is going to Supply Request Completed and Awaiting Billing. 

Manage Supply Request Exceptions is showing below generic error:

The supply request failed because Global Order Promising didn't create a supply recommendation. For details about how to fix this problem, see the Troubleshoot Supply Chain Orchestration topic on Oracle Help Center.