Elen, have you tried seeing if any screen sessions exist at all?
screen -ls
-should list all screens for the current user, or you could try:
ls -laR /var/run/screen/
-to show all screens on the system.
And if you find a screen you could use:
screen -x screenname
Thank you for the info.
I just tried "screen -ls" which gives: "No Socket found in var/run/screen/S-root"
The "ls -laR /var/run/screen/" gives 3 maps with nothing except there is in /var/run/screen/S-pi one row with "31732.cgminer".
I tried "screen -x 31732.cgminer" but does nothing...