When you use printing to files, you can choose to make a separate file for the answer sheet.

...how could I miss it!!
The reason is that I usually copy the DOC-sujet.pdf file somewhere and
print it on a fast printer.

One other thing, though on a different topic, is that on my printer I have
the possibility to stable the exams atomatically, but of course this
requires the exam to be all of the same number of pages. Unfortunately
sometimes LaTeX impagination creates exams with different number of
pages. Is there anyway to force the number of pages?

Thanks
Lello

Is there anyway to force the number of pages?

You could write a code to call ~\clearpage as long as the page number is less than a specific target.
However, I think this is easier to ask AMC to send the subjects to the printer, with stapling on. AMC sends one job for each student subject, so that the subjects are stapled individually.

Does this approach staple the answer sheet too?

I have just tried this method but the stapling is disabled.
I am using a TaskAlpha 3500i and the stapling is enabled and works perfectly from
other programs (such acrobat reader).

Thanks

Update: Staple seems disabled but when I send the job to the printer
I get the test sheets stapled and then the anwer sheet.
Perfect! Exactly what I needed.

Thanks again.

I have just tried this method but the stapling is disabled.
I am using a TaskAlpha 3500i

Maybe the option name is not the same as in the printer I use... Can you send a PPD file (in /etc/cups/ppd) for this printer to have a look at the option name and values that handle stapling ?

Here it is.

In /usr/lib/AMC/perl/AMC-gui.pl, try to change line 2552 from

  CHOIX: for my $i (qw/StapleLocation/) {

  CHOIX: for my $i (qw/StapleLocation KCStaple/) {

It seems to work. I mean the "staple" options now show up in the cascade menu.
I'll try with the printer as soon as possible and let you know.
Thanks for your help.

Thanks. If all is OK, I will update the development tree with this change.