I guess it is raised without interrupting, when running the check against a real host. I was too slow :):

```
msf exploit(ms08_067_netapi) > check

[*] Verifying vulnerable status... (path: 0x0000005a)
[-] Error while running command check: undefined method `print_good' for #<Metasploit::Framework::Command::Check::Simple:0x007faabebdbfa8>

Call stack:
/Users/juan/Projects/git/limhoff-r7/metasploit-framework/app/models/metasploit/framework/command/check/simple.rb:68:in `run_with_valid'
/Users/juan/Projects/git/limhoff-r7/metasploit-framework/app/models/metasploit/framework/command/base.rb:100:in `run'
/Users/juan/Projects/git/limhoff-r7/metasploit-framework/lib/metasploit/framework/command/parent.rb:98:in `run_with_valid'
/Users/juan/Projects/git/limhoff-r7/metasploit-framework/app/models/metasploit/framework/command/base.rb:100:in `run'
/Users/juan/Projects/git/limhoff-r7/metasploit-framework/lib/metasploit/framework/command/dispatcher.rb:36:in `block (2 levels) in command'
/Users/juan/Projects/git/limhoff-r7/metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb:519:in `run_command'
/Users/juan/Projects/git/limhoff-r7/metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb:481:in `block in run_single'
/Users/juan/Projects/git/limhoff-r7/metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb:475:in `each'
/Users/juan/Projects/git/limhoff-r7/metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb:475:in `run_single'
/Users/juan/Projects/git/limhoff-r7/metasploit-framework/lib/rex/ui/text/shell.rb:200:in `run'
./msfconsole:169:in `<main>'
```