Comment # 1 on bug 1171970 from Thorsten Kukuk

(In reply to William Brown from comment #0)
> It is not possible to use transactional-update dup at this time as when mutt
> requires notifications, it implicitly causes the entire transaction to fail. 

Which is to be expected and a good reason to never use notifications.


> manually performing transactional-update shell then zypper dup works around.

It's not a workaround, it's the correct solution. 
The packager decided to make his package only in interactive mode upgradeable
by using notifications. transactional-update dup is working in non-interacive
mode.

> Expected: System should be able to update.

That's not the expected behavior for a package which requires interactive
update.
The correct fix is to rmeove the mutt notification, which only breaks automatic
updates, not only with transactional-update, but also salt and other tools.