Issue with Alpha Animation

[Sweetsour]

Hello!

I'm trying to create an alpha animation, but I keep getting the following error:

19: attempt to call method 'SetChange' (a nil value)

This is my code:

local BackdropSB = {
    bgFile   = "Interface\\Tooltips\\UI-Tooltip-Background",
    edgeFile = nil,
    tile = true,
    tileSize = 16
}
 
local BackdropBar = CreateFrame("Frame","BackdropBar",UIParent);
BackdropBar:SetPoint("CENTER",0,-95);
BackdropBar:SetWidth(200);
BackdropBar:SetHeight(15);
BackdropBar:SetBackdrop(BackdropSB);
BackdropBar:SetBackdropColor(0,0,0,1);
BackdropBar:Show();
 
local flasher = BackdropBar:CreateAnimationGroup();
 
local fadeIn = flasher:CreateAnimation("Alpha");
fadeIn:SetChange(0.6);
fadeIn:SetDuration(1);
fadeIn:SetOrder(1);
 
local fadeOut = flasher:CreateAnimation("Alpha");
fadeOut:SetDuration(1);
fadeOut:SetChange(-0.4);
fadeOut:SetOrder(2);
fadeOut:SetEndDelay(1);
 
flasher:Play();

Any help would be great, thanks!

[Fizzlemizz]

SetChange is now

SetToAlpha
SetFromAlpha

From WoldmapFrame WoD:

	local change = endAlpha - startAlpha;
	local duration = (change / (WORLD_MAP_MAX_ALPHA - WORLD_MAP_MIN_ALPHA)) * tonumber(GetCVar("mapAnimDuration"));
	anim.Alpha:SetChange(change);
	anim.Alpha:SetDuration(abs(duration));
	anim.Alpha:SetStartDelay(startDelay);
	anim:Play();

From WoldmapFrame Legion:

	local duration = ((endAlpha - startAlpha) / (WORLD_MAP_MAX_ALPHA - WORLD_MAP_MIN_ALPHA)) * tonumber(GetCVar("mapAnimDuration"));
	anim.Alpha:SetFromAlpha(startAlpha);
	anim.Alpha:SetToAlpha(endAlpha);
	anim.Alpha:SetDuration(abs(duration));
	anim.Alpha:SetStartDelay(startDelay);
	anim:Play();

[Sweetsour]

I figured it might have been changed to something else, just didn't find any documentation on it. Thanks!