I had deleted the files in a folder and attempted to close the folder. I
received the message (Firm ware error condition in add line 0 press the 0
key to reset bookport). If 0 is pressed it simply repeats the message. If 2
plus b is pressed the message is again repeated. If d plus e plus f are
pressed to retain settings, the message is again repeated. Fortunately,
removing the batteries, did reset the unit.
Regards
Sharon