In order for orders to properly flow through your system in Counterpoint, the products involved must first be assigned to one of your locations. This article will explain how to assign an inventory location to your product in Counterpoint.
First find the product you're assigning a location to in Counterpoint. Once you've found it, you should find a window like this:
Click on the Inventory button in the bottom right corner, indicated in the above image by the red arrow. This will bring you to this window:
Click on the "+" button in the top left, highlighted here by the red arrow. This should make the window shown below appear.
Select the location you want from the Create inventory for dropdown, or leave it as All locations to create the entry for all your locations. Finish by hitting OK once you're done filling information out here to complete the process.
If you have any further questions about assigning inventory locations in CounterPoint, please feel free to submit a support request.