How can I automate opening accounting periods?

Summary:

I want to be able to automate the opening of cost accounting periods so the customer doesn't have to do it manually.

Content (please ensure you mask any confidential information):

I have a customer that is not using financials but needs costing for maintenance work orders. I am trying to find out if they can automate the opening of new periods. I have been able to schedule the process to open GL periods, but when I try to do the same for accounting periods, I am asked for the Ledger, but the list of values is blank as well as the period: