Diagnosis
You want to lock the total of the period screen. This is not possiblein this case, as this value contributes to a locked total or subtotalon the overview screen and it is not possible to lock another summandon this screen. A change to the total of the period screen (= summandon the overview screen) cannot be redistributed to the overview screen.

System Response
You can only lock this total if you remove the lock on the subtotal onthe overview screen or alternatively if you remove the lock on anothersummand of the subtotal.

Procedure
Note that totals on the period screen are also summands of subtotals ortotals on the overview screen. If a subtotal or total on the overviewscreen is locked, changes to a total on the period screen have to betransferred to the other summands on the overview screen in order forthe total on the overview screen to remain constant. It is thereforeonly possible to lock a total on the period screen if the total orsubtotal on the overview screen is not locked or if there are at leasttwo other unlocked summands on the overview screen.