can't get required plug-in during hp-setup install

[[e-mail]]

I just tried to install hplip-3.14.3 on ubuntu 12.04 (dell xps 13), and get an error at "required plug-in" step .
Here's the procedure I followed, and how it stopped:
1. Manual install
2. sudo hp-setup
3. On te "Driver plug-in installation", I chose "download and install the plug-in from an HP authorized server (recommended)" ).
4. After a few seconds, a "licence agreement" pops-up. I checked the "agree" box, then clicked "next"
5. A "Plug-in install failed" error pop-up appeared

PS: on the terminal, I could find this message:
error: The printer you are trying to setup requires a binary driver plug-in and it failed to install. Please check your internet connection and try again. Visit http://hplipopensource.com for more infomation.

Any help would be appreciated.

[[e-mail] (sbsgillet)]

To keep track of the previous conversation (in case the thread has changed), here is the answer I received:

Amarnath Chitumalla proposed the following answer:
Hi,

Can you please provide following command output to analyse the problem.

$ sudo hp-plugin -g &> plugin.log
$ hp-diagnose_plugin &>diagnose.log

Note:- logs can be attached using "Create bug report".

Thanks & Regards,
Amarnath

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[Amarnath Chitumalla (amarnath-chitumalla)]

Hi,

From the attached logs observed following "utils" global name is not found error.

-------------------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/share/hplip/ui4/plugindiagnose.py", line 100, in NextButton_clicked
    ok, sudo_ok = pkit.run_plugin_command(plugin == PLUGIN_REQUIRED, plugin_reason)
  File "/usr/share/hplip/base/pkit.py", line 454, in run_plugin_command
    su_sudo = utils.su_sudo()
  File "/usr/share/hplip/base/utils.py", line 1628, in su_sudo
    elif utils.which('/usr/lib/kde4/libexec/kdesu'):
NameError: global name 'utils' is not defined
-------------------------------------------------------------------------------

From HPLIP-3.13.10 package onwards, HPLIP doesn't check for kdesu/gksu etc package in the code. Seems like file might have corrupted.

Please install latest HPLIP from http://hplipopensource.com/hplip-web/install.html

Thanks & Regards,
Amarnath

[Amarnath Chitumalla (amarnath-chitumalla)]

Please install HPLIP using auto installation, details steps are given @http://hplipopensource.com/hplip-web/install/install/index.html