o-fir

Getting a null pointer exception when trying to instantiate a problem that's clearly not satisfiable ``` Exception in thread "main" java.lang.NullPointerException at fr.uga.pddl4j.problem.FinalizedProblem.finalizeCondition(FinalizedProblem.java:825) at fr.uga.pddl4j.problem.FinalizedProblem.finalizeCondition(FinalizedProblem.java:832) at fr.uga.pddl4j.problem.FinalizedProblem.finalizeGoal(FinalizedProblem.java:781) at fr.uga.pddl4j.problem.HTNProblem.finalization(HTNProblem.java:224) at...

For the action _**(do_decontaminate env1 c1)**_ of type ``` (:action do_decontaminate :parameters (?env - environment ?c - contamination) :precondition (and (contaminated ?env ?c) ) :effect (and (not(contaminated ?env ?c)) )...

HDDL - initial task network returns a list of null

1

Calling `problem.getInitialTaskNetwork().getTasks() `on **Towers benchmark (IPC)** returns a list with a **null** task. Also, if original HTN was simply `(task0 (shiftTower t1 t2 t3))` and I introduce an additional task...