VMAIL_ERROR: undefined local variable or method `num'

[nsagar1990]

VMAIL_ERROR: undefined local variable or method num' for #<Net::IMAP:0x00000001c3b260> /usr/lib/ruby/1.9.1/net/imap.rb:1230:invalidate_data'
/usr/lib/ruby/1.9.1/net/imap.rb:1179:in block (2 levels) in send_command' /usr/lib/ruby/1.9.1/net/imap.rb:1178:ineach'
/usr/lib/ruby/1.9.1/net/imap.rb:1178:in block in send_command' /usr/lib/ruby/1.9.1/monitor.rb:211:inmon_synchronize'
/usr/lib/ruby/1.9.1/net/imap.rb:1177:in send_command' /usr/lib/ruby/1.9.1/net/imap.rb:419:inlogin'
/var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail/imap_client.rb:68:in open' /var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail/imap_client.rb:524:instart'
/var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail/imap_client.rb:530:in daemon' /var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail.rb:69:instart'
/var/lib/gems/1.9.1/gems/vmail-2.9.3/bin/vmail:14:in <top (required)>' /usr/local/bin/vmail:23:inload'
/usr/local/bin/vmail:23:in <main>' Starting gmail service at druby://myname-desktop-5:44745 /usr/lib/ruby/1.9.1/net/imap.rb:1143:inget_tagged_response': Unknown command ef3mb85393934igc (Net::IMAP::BadResponseError)
from /usr/lib/ruby/1.9.1/net/imap.rb:1195:in block in send_command' from /usr/lib/ruby/1.9.1/monitor.rb:211:inmon_synchronize'
from /usr/lib/ruby/1.9.1/net/imap.rb:1177:in send_command' from /usr/lib/ruby/1.9.1/net/imap.rb:526:inblock in list'
from /usr/lib/ruby/1.9.1/monitor.rb:211:in mon_synchronize' from /usr/lib/ruby/1.9.1/net/imap.rb:525:inlist'
from /var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail/imap_client.rb:166:in list_mailboxes' from /var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail/imap_client.rb:196:inmailboxes'
from /var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail/imap_client.rb:184:in block (2 levels) in mailbox_aliases' from /var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail/imap_client.rb:183:ineach'
from /var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail/imap_client.rb:183:in block in mailbox_aliases' from /var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail/imap_client.rb:182:ineach'
from /var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail/imap_client.rb:182:in mailbox_aliases' from /var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail/imap_client.rb:92:inselect_mailbox'
from /usr/lib/ruby/1.9.1/drb/drb.rb:1083:in method_missing' from /var/lib/gems/1.9.1/gems/vmail-2.9.3/lib/vmail.rb:79:instart'
from /var/lib/gems/1.9.1/gems/vmail-2.9.3/bin/vmail:14:in <top (required)>' from /usr/local/bin/vmail:23:inload'
from /usr/local/bin/vmail:23:in `