Application Manager operation failed

This list of operations following has been successfully tried on a Nokia 770 Internet Tablet with OS 2006,
in order to resolve a situation in which, after an Internet update of a program (WiFiinfo), the Application Manager
was unable to perform the update, giving an "Application Manager operation failed" message every
time the Application Manager was executed.
Simply, you are unable to see packages installed, remove or add packages.

You need the following prerequisites:

-you should have xterm installed
-you should have the LINUX flasher downloaded. I have used flasher 3.0 on UBUNTU 7.10
-you should have a LINUX distribution installed. I have used UBUNTU 7.10

The problem is in the tablet, in the directory /var/cache/apt , where there are the files downloaded after the
last unsuccessful update, that the Application Manager tries to reapply unsuccessfully every time it is executed.

The solution is deleting everything is in /var/cache/apt , acting as root for the tablet.

1 - Fully charge the tablet. Better to have the battery full.
2 - In Linux, execute the flasher as root in order to activate Research and Development mode, so that you
can execute gainroot

Nokia switched off, not usb connected to the computer

su root
./flasher - -enable-rd-mode

LINUX will say that it is waiting something on the usb port
connect the tablet to the usb cable
hold the HOME tablet key (the one with the home icon)
switch the tablet on
On the tablet, some icons will appear
On linux, the flasher will say "R & D mode enabled"
disconnect the tablet from the usb port, and it will automatically reboot
After reboot, you will note nothing strange, but now you can become root...
run xterm
in xterm write
sudo gainroot
you will receive the # root prompt
write
cd /var/cache/apt
rm -r *
mkdir archives
cd archives
mkdir partial

now the directories will be empty.
try to run the Application Manager, and your problems should be gone away.

Now, let's disable R & D mode.
Nokia switched off, not usb connected to the computer

su root
./flasher - -disable-rd-mode

LINUX will say that it is waiting something on the usb port
connect the tablet to the usb cable
hold the HOME tablet key (the one with the home icon)
switch the tablet on
On the tablet, some icons will appear
On linux, the flasher will say "R & D mode disabled"

That's all, folks.