Some Channels "n/a"?

[Rookie]

Hey guys,

Not sure what's going on but recently some of my channels are showing up as N/A?

Have updated the box, rescanned and rebooted several times but still have some channels showing up with this beside them. Then if I click on them I get an error about not being able to find channel. Any ideas?

[Rob van der Does]

1- which image are you using (brand and version)?
2- What settings do you have installed?