I have set up a screen rc file like this:
log on
shelltitle apt
logfile $HOME/configs/screen/screenlogs/apt.log
logtstamp after 120
and I am starting like this:
screen -c ~/configs/screen/apt.rc
But after using for a while the apt.log file is never created. The syntax looks perfect to me, unless there is something about the logfile syntax I am not getting