Error during subtraction of INT values

Setup, Configuration and Use Scripts & Rules
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4

You’re trying to set a variable totalMinTillDimStart by performing maths with this same variable (totalMinTillDimStart - SunriseWakeUpDimFadeInTime) - does openHAB handle this well? Have you tried using a differently named variable to store the result?

EDIT:
Hmmm, no, that’s not it. I tried the below rule, and it outputs without error:

rule "Test rule1"
when
    Item sTestSwitch changed
then
    val hours = 7
    val minutes = 7
    val SunriseWakeUpDimFadeInTime = 35
    val totalMinTillDimStart = (hours * 60) + minutes
    logInfo("Test","1. totalMinTillDimStart: " + totalMinTillDimStart)
    totalMinTillDimStart =  totalMinTillDimStart - SunriseWakeUpDimFadeInTime
    logInfo("Test","2. totalMinTillDimStart: " + totalMinTillDimStart)
end

Triggering this shows the following in the log:

15:48:55.496 [INFO ] [g.eclipse.smarthome.model.script.Test] - 1. totalMinTillDimStart: 427
15:48:55.513 [INFO ] [g.eclipse.smarthome.model.script.Test] - 2. totalMinTillDimStart: 392

However, when saving the rules file I do get a validation issue in the log:

15:49:03.449 [INFO ] [del.core.internal.ModelRepositoryImpl] - Validation issues found in configuration model 'test.rules', using it anyway:
Assignment to final variable

EDIT2:

Also worth noting that according to this, val cannot be re-assigned, whilst var can. Not sure why the above code worked, then…