I have an assembly that I was working on and once I was done, it showed that all of the features were showing fully defined.  I got pulled onto another project for a few weeks and when I came back to it, and re-opened the assembly, it now shows under defined.  Is there a way to show what features/components are not defined yet?  I can't see where anything is wrong and if I click and try to drag any of the components to see if any mates are broken, nothing moves so it acts like it's constrained.  Thanks.