Unable To Upgrade to Dapper Drake

[Chris Meissen]

I've got two computers on which I've been running Edubuntu 5.10 since
before last Christmas. One is "mine," the other is my daughter's.  Mine
is a Sempron 2400 with 128M RAM and my daughter's is a Duron 1.1GHz with
128M RAM.

When Dapper Drake was released, I chose the "upgrade" option in the
update/upgrade manager and the operation proceeded smoothly on my
Sempron machine. When I try the same on my daughter's machine, the
process halts on step four with the message, "Unable to Calculate the
Upgrade."  It then restores the system to its previous state and exits
from the upgrade manager.

I regret that I'm too much of a newbie to know what to do to try to
resolve this problem.  Does anyone have any suggestions?

Chris Meissen
West Plains, MO