Open Excel Network docs block standby - sometimes
 

I work on a laptop in a docking station. At days end the laptop goes home.
Rather than do a reboot every day, since I have30 or 40 windows open, I
prefer to have the computer go to standby mode. This works fine about 4 out
of 5 times. The other time an open network doc blocks the system from going
on standy.

The problem is I cannot tell why sometimes it works and other times it does
not. It is usually Excel that seems to block me, with a message "Windows
cannot go on standby because Office docs or app components are being accessed
from the network. You must close..." even though there is ALWAYS a network
doc open, since I have my My Documents folder designated to a network drive
and everything shows up as shadow files.

Any ideas about what might cause this to work most times but not others
appreciated.
ed