Error comparing DecimalType values

Setup, Configuration and Use Beginners
1

Evening,

I’m needing a little help. I’m trying to write a rule to compair my current household power usage with the value last week and OpenHAB 1.8.3 is giving me a strange error.

Here is my rule so far:

rule "Announce Power Usage"
when
Item EnergyUseCurrent changed
then

var DecimalType EnergyUseCurrentDecimalType = EnergyUseCurrent.state as DecimalType;
var DecimalType compareWith = EnergyUseLastWk.state as DecimalType;

logInfo("EnergyUseCurrent", ".. Line 229, compare " + EnergyUseCurrentDecimalType + " with " + compareWith)
if ( EnergyUseCurrentDecimalType >= compareWith ) {
	logInfo("EnergyUseCurrent", ".. Line 231")
	logInfo("EnergyUseCurrent", "Current consumption " + EnergyUseCurrent.state + " Kwh is now higher than this time last week " + EnergyUseLastWk.state + " Kwh" )
	sendCommand(vrPowerHigh, ON)
} else {
	logInfo("EnergyUseCurrent", ".. Line 235")
}

end

my logs prints out “[.script.EnergyUseCurrent] - … Line 229, compare 1.05750 with 0.731” but then it stops and I get this error

[ERROR] [.s.ScriptExecutionThread] - Error during the execution of rule ‘Announce Power Usage’: Could not invoke method: org.openhab.model.script.lib.NumberExtensions.operator_greaterEqualsThan(org.openhab.core.types.Type,java.lang.Number) on instance: null

I cant understand it since I know from “Line 229” that nether value is null. Can anyone offer any suggestion on what I’m missing?

Stu

2

Instead of using DecimalType for EnergyUseCurrentDecimalType and comapreWith, try using Number.

It should work as written but since it doesn’t that is the first thing I would try.

You also might try loading the rule in Designer to see if there is a syntax error we are not noticing.