I am trying to run Portable Truecrypt from a USB Pendrive. I already extracted the package and all but the only way I can really open Truecrypt portable is if the executable is somewhere in my home folder. It never does when I open the executable from the pendrive. I'm using Ubuntu 12.04.

I have tried to go to permissions and set "allow to run as an application" but anyway when double-clicking, the same alert comes up:

Unable to present media/Kingston/usr/bin/truecrypt, there is no application 

installed for executable files.

However it does open normally from home folder, so I do not understand this output that Ubuntu can't find an application to open executable files, given that it opens them just fine as long as they are present in the home folder.

I've formatted another pendrive as NFTS first and then as ext4 to check if it was related to filesystems, opened it with full administrative rights, extracted Truecrypt files there, but still the same error returns, and while attempting to execute the file from terminal, permission is denied.