What were you trying to do? What is the full error message?
What version of Lightroom?
Can't you pull the plug and then restart your computer?
A small window - at the top “Preparing Book” below that “Gathering Photos”
I can not close Lr
I can not reboot
I can not shut down
Pull the plug?
Whatever has happened is indicative of a problem/bug/error, it shouldn't run for 12 hours.
Pull the plug.
What plug might that be?
Sent from mobile office
Power cord plug
The power plug has been pulled. Are you saying let the battery run all the way down?
Did you hold the power button down for an extended period of time. This usually forces a shutdown.
Thanks - that has fixed the issue. Shut down and started back up fine.