Autodesk Inventor Users

Created by Constantin STANCESCU on 25 April, 2018

The features of the parts are missing in model tree it is displaying only as "SOLID"

These parts are created by me, but when i open inventor today in the model tree it is showing only as "Solid" not the process involved in making the part

Why this has happened ? Any ways available to change it to normal ? or i need to recreate every part ??