Synaptic Package Manager not accessible

amy

Hi, I've just tried to launch Synaptic Package Manager. I was asked (as usual) to insert my password. I must've mistyped (although I'm not sure). Anyway, I tried again, inserted the right password, and the following message popped up:

'E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem.
E: _cache-gt;open() failed, please report.'

I run 'dpkg --configure -a' on Terminal, and got the following:

'dpkg: requested operation requires superuser privilege'

Do you know what I should do? Thank you!!!

sudo gives you super user privileges.

sudo dpkg --configure -a

Thank You!!!