I'm always iffy about using scid -a, as it doesn't take into consideration if you're connected to a server or not.
That's what the -t1 switch is for. From the help file:
The -tM switch limits the command to being performed only on servers with a certain connection status, where M is an or'd value of 1 = server connected, 2 = not connected...
So, the -t1 switch makes the command only execute on servers that you
are connected to.
