Remaining time or counter

[Tee_Trinker]

Hi guys, I'm using Erwin's script.
But recently I've been getting this error message in the script log.
I use the script to operate an EnOcean switching module. It sends a short button signal to my garage door opener.
Everything still works, only this error message is new.
What could it be?

Thanks for the help
David

Code:

-- ** Staircase logic with external time object and retriggering on input object Version 3.1 ** -- -- ****************************** Created by Erwin van der Zwart **************************** -- -- ************************************** SET PARAMETERS ************************************ -- -- Set input address AddressInput = '32/1/80' -- Set output address AddressOutput = '32/1/71' -- Set unique name for staircase timer (to avoid same storage name usage) StaircaseName = 'PIR_TR2_1' -- Set external time address (optional) AddressExternalTime = '4' -- Use time left indication UseTimeLeft = false -- Set to true if time left indication will be used -- Set feedback adress of time left indication (optional) AddressTimeLeft = '' -- Set time delay (Used when external time is not available) SetDelay = 2 -- Seconds or Minutes SetSec = true-- Set to false for Minutes -- Set factor delay (Multiplies Delay) SetFac = 2 -- Logic can be turned of by value 0 Off_by_Value_Zero = false -- ************************************** END PARAMETERS ************************************ -- -- *************************** DON'T CHANGE ANYTHING UNDER THIS LINE ************************ -- inputvalue = event.getvalue if Off_by_Value_Zero == false and (event.getvalue() == false or event.getvalue() == 0) then   -- Exit script   return end ValueInput = grp.getvalue(AddressInput) ValueOutput = grp.getvalue(AddressOutput) ValueExternalTime = grp.getvalue(AddressExternalTime) if SetSec == true then   SetSeconds = 1 else   SetSeconds = 60 end if ValueExternalTime == nil then ValueExternalTime = 0 end if ValueExternalTime > 0 then   StairCaseTime = ValueExternalTime * SetSeconds * SetFac else   StairCaseTime = SetDelay * SetSeconds * SetFac end if ValueInput == true then   --check for earlier started scrips   --check storage for stpid value   stpid = storage.get(StaircaseName)    --check if stpid has a value   if stpid == nil then     pid = os.getpid()     storage.set(StaircaseName, pid)   else     -- kill earlier running script        os.kill(stpid, signal.SIGKILL)     -- create new pid for next time to kill     pid = os.getpid()      storage.set(StaircaseName, pid)   end   if ValueOutput == false then     grp.write(AddressOutput, true)     ValueOutput = true   end   -- Check time left indication is used   if UseTimeLeft == true then     if StairCaseTime > 0 then         grp.update(AddressTimeLeft, StairCaseTime)         repeat           StairCaseTime = StairCaseTime - 1           grp.update(AddressTimeLeft, StairCaseTime)           os.sleep(1)         until StairCaseTime == 0     end      else     os.sleep(StairCaseTime)   end   ValueOutput = grp.getvalue(AddressOutput)   if ValueOutput == true then     ValueInput = grp.getvalue(AddressInput)     if ValueInput == true then         grp.write(AddressInput, false)       ValueInput = false     end     if Off_by_Value_Zero == false then       if ValueOutput == true then             grp.write(AddressOutput, false)         ValueOutput = false           end     else       -- Do nothing, this will trigger else condition below on next run     end   end  else   --check for earlier started scrips   --check storage for stpid value   stpid = storage.get(StaircaseName)    --check if stpid has a value   if stpid == nil then   else     -- kill earlier running script        os.kill(stpid, signal.SIGKILL)     grp.update(AddressTimeLeft, 0)     pid = nil     storage.set(StaircaseName, pid)   end   if ValueOutput == true then     grp.write(AddressOutput, false)   end end