This document used an Autocad file for house modeling ...... maybe that was the reason, but I would like to say that the problems on both days started with the import of roofing from 3d Warehouse, in any case it was not observed before.

Auto save settings stand for 5 minutes, nothing was changed, previously worked perfectly.
PS: I still can't repair the program. I'll do it next week.

Mado

The file it couldn't be, think something went wrong with Autosave, reinstall Sketchup.
I lost my 4 hour job yesterday, today almost the same thing happened!

I found a copy of the file and was able to finish the job.
Here is the result ......

Thank you TIG, , I try to fixed. I give answer if is work perfect!

.Mado.

Help!
Sketchup 2019, Crash file in working process.......