Last 12 months data

Hi All,

I need a help to extract last 12 months data to see invoice revenue. I have fiscal year period and variant in my info provider, is it possible to extract last 12 months data with this two time characteristics. If yes, could you please let me know how it is done?

I tried setting up offset -12 for 0FSPER variable but when I execute a query it give me error "Variable 0FPER could not be replaced."

Thanks in advance.