Thank you very much for your attention.

sudo apt-get install gem

Gives me:

Reading package lists... Done

Building dependency tree

Reading state information... Done

gem is already the newest version (1:0.93.3-13).

0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

So I uninstalled gem with

sudo apt-get remove gem

and reinstalled it with

sudo apt-get install gem

it installed 6 new packages, but I cannot open gem objects in pd. I am looking for the directory of gem to put it in preferences>path but cannot find it. So I installed locate and found it is in

/usr/lib/pd/extra/Gem/

with capital G (why? isn’t its name “gem”?)

Anyway I added this path to pd preferences and when I create object |gemwin| it still gives me lots of errors for related objects.

Then I found this other directory (with “gem”, not capital letter)

/usr/share/gem/

added this to the preferences>path with no success.

I finally was able to do it running:

Thank you very much again for your support.