Hi frank when I tried to save a project, Kommiter is invoked and I got calibrateScrollbar "Set the scrollbar parameters to match the texts." | maxY range delta innerH | self fullBounds. maxY := self srcMorph extent y max: self dstMorph extent y. innerH := self dstMorph innerBounds height. delta := 91. "self dstMorph textMorph defaultLineHeight" range := maxY - innerH max: 0. range = 0 ifTrue: [ ^ self scrollbarMorph scrollDelta: 0.02 pageDelta: 0.2; interval: 1.0; setValue: 0.0 ]. self scrollbarMorph scrollDelta: (delta / range) asFloat pageDelta: ((innerH - delta) / range) asFloat; interval: (innerH / maxY) asFloat; setValue: ((self srcMorph scroller offset y max: self dstMorph scroller offset y) / range min: 1.0) asFloat ^^^^^^^ where srcMoirph is a RubScrolledTextMorph Stef