SetAttribute protected error

[Pyrates]

Hello again

I have the following portion of code:

local MaxGroup = CreateFrame("Frame", "SanUIRaidMaxGroup")
        MaxGroup:RegisterEvent("PLAYER_ENTERING_WORLD")
        MaxGroup:RegisterEvent("ZONE_CHANGED_NEW_AREA")
        MaxGroup:SetScript("OnEvent", function(self)
            local filter
            local inInstance, instanceType = IsInInstance()
            local _, _, _, _, maxPlayers, _, _ = GetInstanceInfo()
            
            if maxPlayers == 25 then
                filter = twentyfive
            elseif maxPlayers == 10 then
                filter = ten
            else
                filter = forty
            end
 
            if inInstance and instanceType == "raid" then
                SanUIRaid:SetAttribute("groupFilter", filter)
                if C.unitframes.showraidpets then
                    SanUIRaidPets:SetAttribute("groupFilter", filter)
                end
            else
                SanUIRaid:SetAttribute("groupFilter", "1,2,3,4,5,6,7,8")
                if C.unitframes.showraidpets then
                    SanUIRaidPets:SetAttribute("groupFilter", "1,2,3,4,5,6,7,8")
                end
            end
        end)

SanUIRaid and SanUIRaidPets are the headers for raid/pets. I sometimes get the following errors:

2x [ADDON_ACTION_BLOCKED] AddOn 'Tukui' hat versucht die geschützte Funktion 'SanUIRaid:SetAttribute()' aufzurufen.
AddOns\!BugGrabber\BugGrabber.lua:581: in function <AddOns\!BugGrabber\BugGrabber.lua:581>
[C]: in function `SetAttribute'
AddOns\SanUI\raidframes.lua:910: in function <AddOns\SanUI\raidframes.lua:891>

Locals:
nil

2x [ADDON_ACTION_BLOCKED] AddOn 'Tukui' hat versucht die geschützte Funktion 'SanUIRaidPets:SetAttribute()' aufzurufen.
AddOns\!BugGrabber\BugGrabber.lua:581: in function <AddOns\!BugGrabber\BugGrabber.lua:581>
[C]: in function `SetAttribute'
AddOns\SanUI\raidframes.lua:912: in function <AddOns\SanUI\raidframes.lua:891>

Locals:
nil

The error message translates to english as "Addon Tukui tried to call the protected function 'SanUIRaid:SetAttribute()' ", which is a bit strange, since the code does not belong to the addon Tukui (but I use Tukui as a basis and there might be some spawn magic I don't understand; my guess is that this does not really matter). Lines 910 and 912 are the last two SetAttribute calls in the code, but it might be that at other times (i.e. when I'm in a raid) those other 2 calls are the problems. If the full code would be more helpfull, I suggest you download SanUI, the file would be SanUI/raidframes.lua.

The error isn't really reproduceable. A guess would be that this happens at the rare occasions where PLAYER_ENTERING_WORLD or ZONE_CHANGED_NEW_AREA fire while in combat (which isn't easily tested, so I'm not sure).

What's the problem here? Is SetAttribute not useable in combat? I thought that was the point of SetAttribute to let you change table entries you can't access directly... Thanks for any help and pointers!

[Rainrider]

You can't modify secure frames in combat. You can check for InCombatLockdown() and apply your changes at PLAYER_REGEN_ENABLED though.

[Pyrates]

Ah ok then, I'll give that a shot. Thanks!