I’m getting the unexpected file format error…I have tried changing skb to skp and it didn’t work. I use 2018 Pro at the office and have 2019 at home. I might have changed the “save as” when using the office 2018 version to save as 2019 to open at home or maybe the other way around. I can see my drawing in the window pane so I know its there it’s just not opening and I cannot figure it out. Is there anything someone can suggest or even take a look at my files?