Settings  =  {
  Name  =   'ParamRequest' ,
  line  =  {
    { Name  =   'ParamRequest'  }
  }
}

 function   Init ()
   return   # Settings.line
 end 

 local  class_code, sec_code
 function   OnChangeSettings ()
  OnDestroy()
   local  DSI  =   getDataSourceInfo ()
  class_code  =  DSI.class_code
  sec_code  =  DSI.sec_code
   PrintDbgStr (tostring(sec_code))
  ParamRequest(class_code, sec_code,  'LAST' )
 end 

 function   OnCalculate (index)
   if  index  =  =   1   then 
    ParamRequest(class_code, sec_code,  'LAST' )
   end 
   return   nil 
 end 

 function   OnDestroy ()
   if  sec_code  then 
    CancelParamRequest(class_code, sec_code,  'LAST' )
   end 
 end   

Settings={}
Settings.Name = "minimal"
function Init()
   return 1
end
local ind = {}
function OnCalculate(index)
  if not ind[index] then 
     ind[index] = 100
  else
     ind[index] = ind[index] + 100
  end  
  return ind[index]
end

Settings = {
  Name = 'ParamRequest',
  line = {
    { Name = 'ParamRequest' }
  }
}

function Init()
  return #Settings.line
end

local class_code, sec_code
function OnChangeSettings()
  OnDestroy()
  local DSI = getDataSourceInfo()
  class_code = DSI.class_code
  sec_code = DSI.sec_code
  PrintDbgStr(tostring(sec_code))
  ParamRequest(class_code, sec_code, 'LAST')
end

function OnCalculate(index)
  if index == 1 then
    ParamRequest(class_code, sec_code, 'LAST')
  end
  return nil
end

function OnDestroy()
  if sec_code then
    CancelParamRequest(class_code, sec_code, 'LAST')
  end
end