when I update Metasploit Framework in BT5 R1 , show this error in console :

/opt/framework/msf3/lib/msf/core/exploit/snmp.rb:2:in `require': no such file to load -- snmp (LoadError)
from /opt/framework/msf3/lib/msf/core/exploit/snmp.rb:2:in `<top (required)>'
from /opt/framework/msf3/lib/msf/core/exploit/mixins.rb:47:in `require'
from /opt/framework/msf3/lib/msf/core/exploit/mixins.rb:47:in `<top (required)>'
from /opt/framework/msf3/lib/msf/core/exploit.rb:217:in `require'
from /opt/framework/msf3/lib/msf/core/exploit.rb:217:in `<class:Exploit>'
from /opt/framework/msf3/lib/msf/core/exploit.rb:29:in `<module:Msf>'
from /opt/framework/msf3/lib/msf/core/exploit.rb:4:in `<top (required)>'
from /opt/framework/msf3/lib/msf/core.rb:52:in `require'
from /opt/framework/msf3/lib/msf/core.rb:52:in `<top (required)>'
from /opt/framework/msf3/lib/msf/ui/console/driver.rb:1:in `require'
from /opt/framework/msf3/lib/msf/ui/console/driver.rb:1:in `<top (required)>'
from /opt/framework/msf3/lib/msf/ui/console.rb:10:in `require'
from /opt/framework/msf3/lib/msf/ui/console.rb:10:in `<top (required)>'
from /opt/framework/msf3/lib/msf/ui.rb:10:in `require'
from /opt/framework/msf3/lib/msf/ui.rb:10:in `<top (required)>'
from /opt/framework/msf3/msfconsole:118:in `require'
from /opt/framework/msf3/msfconsole:118:in `<main>'