Entire Assembly and some constituent parts disappeared

[Anonymous]

I was working on an assembly with a bunch of different components, been an ongoing project for a few weeks now. I had many versions of the assembly. Today i closed it down and went to reopen it later and the entire assembly and some parts have literally disappeared, i cant find the files anywhere. This is very frustrating, can anyone offer my any help on what could have happened?

[davebYYPCU]

Saved with timeline, not at the end?

Activate top component / root of file, Send Timeline marker to the right hand end.

Expected result - or not?

Might help.... 

[jeff_strater]

Please share the design here, hard to tell without the design itself.