I have downloaded 2015 a 3.0 Creo educational version, and now this year when I start Creo 3.0 Parametric I get an error code which is in an appendix( that's in .png file and is a printscreen take).
Perhaps my Creo licence is no more valid, still when I downloaded that it should last about 2 years.
Thank you for your answer. It may be correct, but I checked Creo error message again and it showed that my license expired in 15.02.2016. So. I uninstalled it and loaded Creo Elements/Direct 6.0 for training Creo.