ubuntu software center crash

[Danilo Luchini]

problem during ARES Commander Editor installation: this is a CAD multiplatform software.
The italian message is like: "Seem to be a problem in aptdaemon, the program used to install e remove software and manage software packages. Report this problem to http://....\"

You can download Ubuntu version at URL:
http://new.graebert.com/index.php?option=com_content&view=article&id=99&Itemid=105&lang=en

I try to ask help to Graeber, but they answer to me:

Hello,
This is not an ARES CE related problem but a general problem
in Ubuntu. You must have only one instance of the
package manager / update manager / aptidude running, running
because each of these and similar programs for installing software
needs an exclusive access to the SW-package database.
So please close all programs first, which will access to this DB.
Best regards