Resident script pump circulation

[Domoticatorino]

Code:

valveStatesTagEstate = 'pompa_circolazione_giorno_estate' valveStatesTagInverno = 'pompa_circolazione_giorno_inverno' pumpGA = '2/0/1' openingValveTime = 60 -- time for fully open the valve (maximum time for next calculation) minInterval = 30 -- minimum offset for next calculation opened, firstTimestamp = false, 0 if stagione == false then     valveStatesEstate = grp.tag(valveStatesTagEstate)     for v = 1, #valveStatesEstate, 1 do      valveStateEstate = valveStatesEstate[v]      if valveStateEstate.value then        opened = true        if firstTimestamp > 0 then          if firstTimestamp > valveStateEstate.updatetime then firstTimestamp = valveStateEstate.updatetime end        else          firstTimestamp = valveStateEstate.updatetime        end      end  end else    valveStatesInverno = grp.tag(valveStatesTagInverno)    for v = 1, #valveStatesInverno, 1 do      valveStateInverno = valveStatesInverno[v]      if valveStateInverno.value then        opened = true        if firstTimestamp > 0 then          if firstTimestamp > valveStateInverno.updatetime then firstTimestamp = valveStateInverno.updatetime end        else          firstTimestamp = valveStateInverno.updatetime        end      end end end if opened then    fullyOpened = (os.microtime() - firstTimestamp) >= openingValveTime    if fullyOpened then        grp.checkwrite(pumpGA, true)        nextCalculationAfter = minInterval    else        grp.checkwrite(pumpGA, false)        nextCalculationAfter = openingValveTime + 1 - (os.microtime() - firstTimestamp) -- run a little after possible change    end else    grp.checkwrite(pumpGA, false)    nextCalculationAfter = openingValveTime + 1 end -- log('Next calculation after: ' .. nextCalculationAfter .. 's.') log(valveStatesEstate) os.sleep(nextCalculationAfter)

Hi,
In your opinion what is wrong in this script above. I add a condition to separate winter condition from summer condition.

I log variable log(valveStatesEstate) but the result is nil. Objects tags are correct and in other 2 scripts (the same) everything works fine.

I cannot understand the reason why it does not working. I expect to read TRUE in log (valveStateEstate).

Thank you for your help.