local run = true

function OnStop()
   run = false
end

function main()
   local ds = CreateDataSource('TQBR', 'LKOH', INTERVAL_M5)
   ds:SetUpdateCallback(function()
      message('HELLO')
      ds:SetEmptyCallback()
   end)
   while run do sleep(100) end
   ds:Close()
end

if sub == nil then
         local r = cds.gds[datasourceid].ds:SetUpdateCallback(function(...)
             local r, e = pcall(updcallback(cds.gds[datasourceid].ds, clientid, datassourceid,...))
             if not r then message(e) end
     end)
         utils.dprint("119 cds.lua subds "..tostring(r) )
    end

if sub == nil then
         local r = cds.gds[datasourceid].ds:SetUpdateCallback(function(...)
         updcallback(cds.gds[datasourceid].ds, clientid, datassourceid,...)
    end)
         utils.dprint("119 cds.lua subds "..tostring(r) )
    end
...
function updcallback(lds, client, datasourceid, sub, index) 
   message("UPDCALLBACK "..class .." ".. security)
   utils.dprint(security .. " updcallback")
end