Using 2019 I have experienced the following a few times in the past weeks. (Very annoying and time wasting).
Develop a .PRO file and suddenly find the render goes to blank screen.
If I close 2019 without saving the file, I can start again and the file is available.
If I save the file, the file is reduced to zero bytes and is useless. Windows Explorers reports the file with it's previous last date/time of a useful populated file.
This has happened to large files and to very small files.
I have no other issues with my PC.
I typically run 2019 without other software running simultaneously.
My PC is a year 2017 powerful i7 desktop from a mainstream manufacturer with no modifications.
Running Win 10 with all updates to system and software.
Help please !!