gistfile1.txt

rule "totalMakespan" // This is line 95
    when
        accumulate(
            Allocation(jobType == JobType.SINK, $endDate : endDate);
            $maxProjectEndDate : max($endDate)
        )
    then
        scoreHolder.addSoftConstraintMatch(kcontext, 1, -$maxProjectEndDate); // Line 102
end



Output:


14:39:01.975 [EventQueue-0] ERROR Unable to build KieBaseModel:defaultKieBase
Rule Compilation error : [Rule name='totalMakespan']
	org/optaplanner/examples/projectjobscheduling/solver/Rule_totalMakespan1885837891.java (14:1984) : The operator - is undefined for the argument type(s) Comparable
Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: There are errors in a score DRL:
Error Messages:

// ===============> Why does is say line 95 and not line 102? <==========================
Message [id=1, kieBase=defaultKieBase, level=ERROR, path=org/optaplanner/examples/projectjobscheduling/solver/projectJobSchedulingScoreRules.drl, line=95, column=0
   text=Rule Compilation error The operator - is undefined for the argument type(s) Comparable]
---
Warning Messages:
---
Info Messages:

	at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildDroolsScoreDirectorFactory(ScoreDirectorFactoryConfig.java:507)