License period error for student

[Anonymous]

I use the revit student version 2015, but when I use the "run energy simulation" function, it said that my licence period for the sharing service has ended, I don't why. And I signed in ,it still do not work. Could you please help me solve the problem? 

[maciejwypych]

It's only available for subscription customers - http://www.autodesk.com/products/energy-analysis-revit/overview