This is still the best mission addon out there. Please look into updating it! Maybe rename it "Mission Manager" in order to move forward with this feature which seems to be staying forever in WoW. When updating, remember to include the cost of troops especially since Argus content, since the 3 followers from there are quite expensive (also include the more expensive followers specific to each class). Even if having to manually fix it during Legion, it was my addon of choice. Please consider keeping it and thanks for the great work!

 it is unfortunately abandoned. owners last login is Tue, Feb, 13 2018 11:38:02

 Quick fix: open \Interface\AddOns\GarrisonMissionManager\GarrisonMissionManager.lua, find

local events_for_buildings = {
   GARRISON_BUILDINGS_SWAPPED = true,
   GARRISON_BUILDING_ACTIVATED = true,
   GARRISON_BUILDING_PLACED = true,
   GARRISON_BUILDING_REMOVED = true,
   GARRISON_BUILDING_UPDATE = true,
}

delete this single string

GARRISON_BUILDINGS_SWAPPED = true,

In reply to dartraiden:

Would really love an update on this. I use this daily both in my garrison, AND in my order hall for the percentages choices. Currently got several LUA errors listed below. 

3x ...ns\GarrisonMissionManager\GarrisonMissionManager-v55.lua:160: Attempt to register unknown event "GARRISON_BUILDINGS_SWAPPED"
[C]: in function `RegisterEvent'
...ns\GarrisonMissionManager\GarrisonMissionManager-v55.lua:160: in main chunk
[C]: ?
[C]: in function `LoadAddOn'
FrameXML\UIParent.lua:445: in function `UIParentLoadAddOn'
FrameXML\UIParent.lua:639: in function `OrderHall_LoadUI'
FrameXML\UIParent.lua:714: in function `OrderHall_CheckCommandBar'
FrameXML\UIParent.lua:2039: in function <FrameXML\UIParent.lua:1085>

Locals:
(*temporary) = <unnamed> {
0 = <userdata>
}
(*temporary) = "GARRISON_BUILDINGS_SWAPPED"
---------------------------------------------------------------------------------------------------------------------------------

FrameXML\UIParent.lua:639: in function `OrderHall_LoadUI'
FrameXML\UIParent.lua:714: in function `OrderHall_CheckCommandBar'
FrameXML\UIParent.lua:2039: in function <FrameXML\UIParent.lua:1085>

Locals:
button_prefix = "MissionPage"
parent_frame = <unnamed> {
UpdatePortraitPulse = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:1349
Enemy1 = <unnamed> {
}
CostFrame = <unnamed> {
}
Enemy2 = <unnamed> {
}
CheckCounter = <function> defined @Blizzard_GarrisonTemplates\Blizzard_GarrisonMissionTemplates.lua:2232
StartMissionButton = <unnamed> {
}
ButtonFrame = <unnamed> {
}
IconBG = <unnamed> {
}
FollowerAnchor = <unnamed> {
}
Stage = <unnamed> {
}
UpdateFollowerModel = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:1316
EmptyString = <unnamed> {
}
Enemies = <table> {
}
RewardsFrame = <unnamed> {
}
BuffsFrame = <unnamed> {
}
CalculateDurabilityLoss = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:1387
Followers = <table> {
}
EmptyFollowerModel = <unnamed> {
}
FollowerModel = <unnamed> {
}
0 = <userdata>
UpdateEmptyString = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:1331
BuffsFrameAnchor = <unnamed> {
}
Follower3 = <unnamed> {
}
SetCounters = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:1307
AddFollower = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:1375
MissionType = <unnamed> {
}
Follower1 = <unnamed> {
}
CloseButton = <unnamed> {
}
GetFollowerFrameFromID = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:1339
SetFollowerListSortFuncsForMission = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:1311
UpdateFollowerDurability = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:1397
Follower2 = <unnamed> {
}
Enemy3 = <unnamed> {
}
ItemLevelHitboxFrame = <unnamed> {
}
}
prev = nil
(for index) = 1
(for limit) = 3
(for step) = 1
suffix_idx = 1
suffix = ""
(for index) = 1
(for limit) = 3
(for step) = 1
idx = 1
name = "MissionPage1"
(*temporary) = nil
(*temporary) = "1"
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index upvalue 'gmm_buttons' (a nil value)"
button_suffixes = <table> {
1 = ""
2 = "Yield"
3 = "Unavailable"
}
gmm_buttons = nil
CreateFrame = <function> defined =[C]:-1
GarrisonMissionFrame = GarrisonMissionFrame {
0 = <userdata>
OnClickViewCompletedMissionsButton = <function> defined @Blizzard_GarrisonTemplates\Blizzard_GarrisonMissionTemplates.lua:817
OnDragStartMissionFollower = <function> defined @Blizzard_GarrisonTemplates\Blizzard_GarrisonMissionTemplates.lua:751
OnLoadMainFrame = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:28
NextMission = <function> defined @Blizzard_GarrisonTemplates\Blizzard_GarrisonMissionTemplates.lua:838
SetupCompleteDialog = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:56
SetupMissionList = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:20
CheckCompleteMissions = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:434
TopBorder = <unnamed> {
}
Bottom = <unnamed> {
}
ShowMissionStage = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:212
BotRightCorner = <unnamed> {
}
SetEnemies = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:257
OnDragStopFollowerButton = <function> defined @Blizzard_GarrisonTemplates\Blizzard_GarrisonMissionTemplates.lua:745
UpdateMissionParty = <function> defined =[C]:-1
MissionCompleteBackground = <unnamed> {
}
OnEventMainFrame = <function> defined @Blizzard_GarrisonUI\Blizzard_GarrisonMissionUI.lua:91
RightBorder = <unnamed> {
}
UpdateRewards = <function> defined @Blizzard_Ga

----------------------------------------------------------------------------------------------------------------------------------------

3x ...eGarrisonMissionManager\GarrisonBuilding.lua:384: Usage: <unnamed>:HookScript("frameScriptTypeName", function[, bindingType])
[C]: in function `HookScript'
...eGarrisonMissionManager\GarrisonBuilding.lua:384: in function `GarrisonBuilding_ButtonsInit'
...eGarrisonMissionManager\GarrisonBuilding.lua:410: in main chunk
[C]: ?
[C]: in function `LoadAddOn'
FrameXML\UIParent.lua:445: in function `UIParentLoadAddOn'
FrameXML\UIParent.lua:639: in function `OrderHall_LoadUI'
FrameXML\UIParent.lua:714: in function `OrderHall_CheckCommandBar'
FrameXML\UIParent.lua:2039: in function <FrameXML\UIParent.lua:1085>

Locals:
(*temporary) = <unnamed> {
0 = <userdata>
Text = GarrisonBuildingFrameText {
}
Right = <unnamed> {
}
Middle = <unnamed> {
}
Left = <unnamed> {
}
}
(*temporary) = "OnShow"
(*temporary) = nil

Is this add-on abandoned? It doesn't work in 8.0.1.

why haven't you updated game version to 7.3.0 in r397-alpha

Whats wrong with the update? 13Feb2018 and game version 7.2.5?

One baffling concept of this addon is why, if one is trying to conserve resources and still reach the maximum %, it wants to put the most precious resources into play rather than the minimum resources into play. For instance, it will try to fill all the slots with back line troops which cost the most to replace rather than trying to use the least number and expensive back line troops. Why does it even use back line troops if the mission can be 200% using just one companion and no back line troops? This just seems to be counter productive to what I thought this addon was attempting to provide.

V-55 I downloaded 4/13/2017??? don't get it

Great addon, I only wish it would have the option to always prioritize minions over troops. It never does this, it always seems to favor troops over your minions even if they will die from it. 

Hoffe auch, das es bald ein update dieses Addons gibt.
Trotzdem hoffe ich an erster stelle, das es dem Entwickler gut geht.
Solange sollten wir, unser eigenes Köpfchen Anstrengen.
Ist nur ein Spiel. :)
English Translate:
Also hope that there will soon be an update of this addon.
Nevertheless, I hope in the first place that the developer is good.
As long as we should, our own head effort.
It's only a game. :)

Can you please update this addon? It's a very helpful addon that makes  doing follower missions quick, easy , and efficient.