guiGridListAddRow() - Boolean Value

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Hey Guys,

I got a strange problem today. I made a mapshop but the script outputs an error that guiGridListAddRow is a boolean value. How can guiGridListAddRow() be a boolean value?

Here's the code:

addEvent("panel:fillmap",true) 
    addEventHandler("panel:fillmap", getRootElement(), function(gamemodeMapTable,gamemode,map,s) 
        if gamemodeMapTable then 
        guiGridListClear(msGridlist) 
        local row = guiGridListAddRow(msGridlist) 
        aGamemodeMapTable = gamemodeMapTable; 
        for id,gamemode in pairs (gamemodeMapTable) do 
            if (gamemode.name == "Race") then 
                for id,map in ipairs (gamemode.maps) do 
                    if s then 
                        if string.find(string.lower(map.name),string.lower(s)) then 
                             guiGridListSetItemText(msGridlist,guiGridListAddRow(msGridlist),gColumn,map.name,false,false); 
                        end 
                    else 
                         guiGridListSetItemText(msGridlist,guiGridListAddRow(msGridlist),gColumn,map.name,false,false); 
                    end 
                end 
            end 
        end 
    end 
    end) 

Thank you for your help!

[Cadu12]

Returns the row id if it has been created, false otherwise. Next time, you should read wiki about that function.