[p3lim]

Originally Posted by zork NamePlate1 is not found. Script stops. NamePlateIds start at 2xx in my case. Not sure why...it's just what the GetName() spits out.

The reason is because you did /reloads, and the game keeps continuing from where it left off before you did.
Unlike most frames, the nameplates are written (or wrapped) in C, and will not reload like the rest of the UI does.

Here is a way to counter this:

local function Update(self)
    -- do whatever
end
 
local index = 1
local fresh = true
 
local addon = CreateFrame('Frame')
addon:SetScript('OnUpdate', function()
    while _G['NamePlate' .. index] or fresh do
        local frame = _G['NamePlate' .. index]
        if(frame) then
            fresh = false
 
            frame:HookScript('OnShow', Update)
 
            Update(frame)
        end
 
        index = index + 1
    end
end)
addon:Show()