apt-file question

[Robert Epprecht <epprecht@solnet.ch>]

apt-file search vga.h

Can't locate object method "host" via package "URI::_foreign" (perhaps\
 you forgot to load "URI::_foreign"?) at /usr/bin/apt-file line 225.

Yes, I did not 'load "URI::_foreign"' How do I do that?

Robert