Error on a timertimer

I’m using this rule

			temporizadorDespertar = createTimer(now.plusMinutes(retrasoEncendido)) [|
				//callScript("Lavadora") 
                //programacionEncendidoActivado.sendCommand(OFF)
				//logInfo("DESPERTAR", "Hora de despertar")
				if ( (Posicion_Olvi.state as Number).intValue  == 3 ) { 
						Temperatura_Programada.sendCommand((Temperatura_Comfort_Olvi_Mod.state as Number ).floatValue)
					}
					else {
						if (((Posicion_Valentin.state as Number).intValue == 3) ) { 
							Temperatura_Programada.sendCommand((Temperatura_Comfort_Valentin_Mod.state as Number ).floatValue)
						}
						else {
							if ((Posicion_Olvi.state as Number).intValue  == 2 ) { 
								Temperatura_Programada.sendCommand((Temperatura_Cerca_Olvi_Mod.state as Number ).floatValue)
							}
							else {
								if (((Posicion_Valentin.state as Number).intValue == 2)) {
									Temperatura_Programada.sendCommand((Temperatura_Cerca_Valentin_Mod.state as Number ).floatValue)
								}
								else {
									if (((Posicion_Valentin.state as Number).intValue == 0) && (Posicion_Olvi.state as Number).intValue  == 0 ) {
										Temperatura_Programada.sendCommand((Temperatura_Muy_Lejos_Mod.state as Number ).floatValue)
									}
									else {
										Temperatura_Programada.sendCommand((Temperatura_Lejos_Mod.state as Number ).floatValue)
									}
								}
							}
						} 
					}

and getting the following error at the time the timer is suposed to run

2019-03-28 22:30:00.258 [ERROR] [org.quartz.core.JobRunShell         ] - Job DEFAULT.2019-03-28T22:30:00.256+01:00: Proxy for org.eclipse.xtext.xbase.lib.Procedures$Procedure0: [ | {
  org.eclipse.xtext.xbase.impl.XIfExpressionImpl@c254d5
} ] threw an unhandled Exception: 
java.lang.NullPointerException: null
	at org.eclipse.smarthome.model.script.engine.ScriptError.<init>(ScriptError.java:66) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.invokeFeature(ScriptInterpreter.java:140) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:902) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:865) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:224) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:768) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:220) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:500) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter._doEvaluate(ScriptInterpreter.java:243) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:234) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:768) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:220) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.evaluateArgumentExpressions(XbaseInterpreter.java:1116) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._invokeFeature(XbaseInterpreter.java:1046) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.invokeFeature(XbaseInterpreter.java:992) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.invokeFeature(ScriptInterpreter.java:151) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:902) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:226) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:458) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:244) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:447) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:228) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.evaluate(XbaseInterpreter.java:190) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.ClosureInvocationHandler.doInvoke(ClosureInvocationHandler.java:46) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.AbstractClosureInvocationHandler.invoke(AbstractClosureInvocationHandler.java:29) ~[?:?]
	at com.sun.proxy.$Proxy182.apply(Unknown Source) ~[?:?]
	at org.eclipse.smarthome.model.script.internal.actions.TimerExecutionJob.execute(TimerExecutionJob.java:49) ~[?:?]
	at org.quartz.core.JobRunShell.run(JobRunShell.java:202) [107:org.eclipse.smarthome.core.scheduler:0.10.0.oh240]
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573) [107:org.eclipse.smarthome.core.scheduler:0.10.0.oh240]
2019-03-28 22:30:00.401 [ERROR] [org.quartz.core.ErrorLogger         ] - Job (DEFAULT.2019-03-28T22:30:00.256+01:00: Proxy for org.eclipse.xtext.xbase.lib.Procedures$Procedure0: [ | {
  org.eclipse.xtext.xbase.impl.XIfExpressionImpl@c254d5
} ] threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
	at org.quartz.core.JobRunShell.run(JobRunShell.java:213) [107:org.eclipse.smarthome.core.scheduler:0.10.0.oh240]
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573) [107:org.eclipse.smarthome.core.scheduler:0.10.0.oh240]
Caused by: java.lang.NullPointerException
	at org.eclipse.smarthome.model.script.engine.ScriptError.<init>(ScriptError.java:66) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.invokeFeature(ScriptInterpreter.java:140) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:902) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:865) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:224) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:768) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:220) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:500) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter._doEvaluate(ScriptInterpreter.java:243) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:234) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:768) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:220) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.evaluateArgumentExpressions(XbaseInterpreter.java:1116) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._invokeFeature(XbaseInterpreter.java:1046) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.invokeFeature(XbaseInterpreter.java:992) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.invokeFeature(ScriptInterpreter.java:151) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:902) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:226) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:458) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:244) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter._doEvaluate(XbaseInterpreter.java:447) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.doEvaluate(XbaseInterpreter.java:228) ~[?:?]
	at org.eclipse.smarthome.model.script.interpreter.ScriptInterpreter.doEvaluate(ScriptInterpreter.java:226) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.internalEvaluate(XbaseInterpreter.java:204) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.evaluate(XbaseInterpreter.java:190) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.ClosureInvocationHandler.doInvoke(ClosureInvocationHandler.java:46) ~[?:?]
	at org.eclipse.xtext.xbase.interpreter.impl.AbstractClosureInvocationHandler.invoke(AbstractClosureInvocationHandler.java:29) ~[?:?]
	at com.sun.proxy.$Proxy182.apply(Unknown Source) ~[?:?]
	at org.eclipse.smarthome.model.script.internal.actions.TimerExecutionJob.execute(TimerExecutionJob.java:49) ~[?:?]
	at org.quartz.core.JobRunShell.run(JobRunShell.java:202) ~[?:?]
	... 1 more

I have tried it out without the timer and got no error.

rule "Pruebas varias"
when
  Time cron "0 0/3 * 1/1 * ? *" 
then
  logInfo("RULE", "Pos0")
  if ( (Posicion_Olvi.state as Number).intValue  == 3 ) { 
    logInfo("RULE", "Pos1")
    Temperatura_Programada.sendCommand((Temperatura_Nocturna_Mod.state as Number ).floatValue)
  }
  else {
    logInfo("RULE", "Pos2")
    if (((Posicion_Valentin.state as Number).intValue == 3)) { 
      logInfo("RULE", "Pos3")
      Temperatura_Programada.sendCommand((Temperatura_Nocturna_Mod.state as Number ).floatValue)
    }
    else {
      logInfo("RULE", "Pos4")
      if ((Posicion_Olvi.state as Number).intValue  == 2 ) { 
        logInfo("RULE", "Pos5")
        Temperatura_Programada.sendCommand((Temperatura_Cerca_Olvi_Mod.state as Number ).floatValue)
      }
        else {
          logInfo("RULE", "Pos6")
          if (((Posicion_Valentin.state as Number).intValue == 2)) {
            logInfo("RULE", "Pos7")
            Temperatura_Programada.sendCommand((Temperatura_Cerca_Valentin_Mod.state as Number ).floatValue)
          }
          else {
            logInfo("RULE", "Pos8")
            if (((Posicion_Valentin.state as Number).intValue == 0) && (Posicion_Olvi.state as Number).intValue  == 0 ) {
              logInfo("RULE", "Pos9")
              Temperatura_Programada.sendCommand((Temperatura_Muy_Lejos_Mod.state as Number ).floatValue)
            }
            else {
              logInfo("RULE", "Pos10")
              Temperatura_Programada.sendCommand((Temperatura_Lejos_Mod.state as Number ).floatValue)
            }
          }
        }
    } 
  }
end 

How can I debug it?

Thanks.

Edit: Strange. I just tried it changing the time (20:20) and now (20:25) I have no error on the log

Be aware that your ‘if’ expressions will fail if the Item has a NULL state.