I've tried to open several MIB files in tkmib without success. For example:

$ sudo apt-get install tkmib

$ wget http://www.mibsearch.com/vendors/Compaq/download/CPQHLTH-MIB

$ tkmib CPQHLTH-MIB

Click "walk", then you should get an error message like this:

setting opts

getaddrinfo: CPQHLTH-MIB No address associated with hostname

error:snmp_new_session: Couldn't open SNMP session at /usr/lib/perl5/SNMP.pm line 475.

unable to create session at /usr/lib/perl5/SNMP.pm line 547.

Tk::Error: Can't call method "getnext" on unblessed reference at /usr/bin/tkmib line 506.

 main::snmpwalk at /usr/bin/tkmib line 506

 Tk callback for .frame5.button2

 Tk::__ANON__ at /usr/lib/perl5/Tk.pm line 250

 Tk::Button::butUp at /usr/lib/perl5/Tk/Button.pm line 175

 <ButtonRelease-1>

 (command bound to event)

As I'm completely new to SNMP and MIB files, and man tkmib is sparse to say the least, what do I actually need to do to be able to work with this file?