If a locking message appears when trying to access administration areas eg. banking, letter run, diary etc please use the following procedure.
From the main menu of Traveller go to options/tools
Access clear concordance lock
You will see a tick against the appropriate area. There is a box labelled ‘unlock’
to the right of the screen. Place a tick in the box and OK the screen. This
will clear the lock and you should be able to continue with the administration
duties.