NVision Headers for Statement of income

 I am having trouble getting the header for the prior period and Prior YTD to display the correct period end date or the period end name.  It works for the current period with APN and APA for the the current year todate.

Is there a variable that I can use to get this to display - currently I am getting an n/a - like it doesn't know where to look to get that information.

Or if not a variable - any other suggestions.

We are currently using a spreadsheet that we constantly have to update each layout every time we add new data to our calendars and I want something that is less labor intensive.