WowAce

Bartender 4 is  throwing a nil arithmetic error when attempting to apply scaling to the zone ability bar. You can see the issue in the bartender issues list.

I cant seem to figure out my curseforge svn permissions so I cant make a pull request for the changes I have made locally that have worked for me so far.

function lib.SavePosition(frame)

	local parent = frame:GetParent() or nilParent
	-- No, this won't work very well with frames that aren't parented to nil or UIParent
	local s = frame:GetScale()
<br />--New Code
	local left,top = lib.GetPositionByScale(frame:GetLeft(),s), lib.GetPositionByScale(frame:GetTop(),s)
	local right,bottom = lib.GetPositionByScale(frame:GetRight(),s), lib.GetPositionByScale(frame:GetBottom(),s)
--End New Code<br />
	local pwidth, pheight = parent:GetWidth(), parent:GetHeight()

	local x,y,point;

	if left &lt; (pwidth-right) and left &lt; abs((left+right)/2 - pwidth/2) then
		x = left;
		point="LEFT";
	elseif (pwidth-right) &lt; abs((left+right)/2 - pwidth/2) then
		x = right-pwidth;
		point="RIGHT";
	else
		x = (left+right)/2 - pwidth/2;
		point="";
	end
	
	if bottom &lt; (pheight-top) and bottom &lt; abs((bottom+top)/2 - pheight/2) then
		y = bottom;
		point="BOTTOM"..point;
	elseif (pheight-top) &lt; abs((bottom+top)/2 - pheight/2) then
		y = top-pheight;
		point="TOP"..point;
	else
		y = (bottom+top)/2 - pheight/2;
		-- point=""..point;
	end
	
	if point=="" then
		point = "CENTER"
	end
	
	setStorage(frame, "x", x)
	setStorage(frame, "y", y)
	setStorage(frame, "point", point)
	setStorage(frame, "scale", s)
	
	frame:ClearAllPoints()
	frame:SetPoint(point, frame:GetParent(), point, x/s, y/s);
end
<br />--New function
function lib.GetPositionByScale(position,scale)
	if not position then return 0 else return position * scale end
end