scanner not working

I am having an issue similar to this poster https://answers.launchpad.net/hplip/+question/207476.
I have an hp deskjet2512. Its printer worked, and the scanner used to work. However, today it refuses to detect the scanner device now. Hp device manager does not detect the all-in-one printer itself, but it does show in the "printers" section. I am using linux mint 13.
From previous posts, I have gathered that you could use this:
$su -c "hp-logcapture"

However, I get this in response:

$ su -c "hp-logcapture"
Password:
Archiving system logs (i.e. syslog, message, error_log). Press (y=yes*, n=no, q=quit):y
Existing /var/log/syslog log file copied to /var/log/syslog.8.gz
Existing /var/log/cups/error_log log file copied to /var/log/cups/error_log.8.gz
Traceback (most recent call last):
  File "/usr/bin/hp-logcapture", line 224, in <module>
    File_list, File_list_str =utils.expand_list('%s/*.bmp'%TMP_DIR)
AttributeError: 'module' object has no attribute 'expand_list'

For this command:
 "hp-check -t"

However the terminal reports the command is not found.