What causes the GOP webservice to return 01-JAN-1970 as a result
From an R12 EBS, I'm performing an ATP availability check on an existing sales order. I'm just checking one line which has an item that was added as a standard item to the order. The item itself is a specific configuration that was created some time ago and is being re-ordered, which is why it was added as a standard item to the order.
Using the GOP webservice integration, when I attempt the availability check, it always returns an available date of 01-JAN-1970 and I'm not able to find any notes or documents explaining why this is. In a test environment, only the most basic ATP rules are set up to try and get a valid date back. For example, I have an org level rule using the lead time set up to just one day, so this should not be going against the supply chain data.