Revit 2018- fatal error / unrecoverable error

[fa6oomi95]

I am using revit version 2018, and it keeps shutting down showing the messege of fatal error and when ever I try to do something it shuts down especially when I make floors boundary

[barthbradley · Accepted solution]

Have version 2018.2 or 2018.3? 

[fa6oomi95]

I don't know which one !this is what shows