[Jason-users] Start-up exception when printing out warnings about singletons

[Francisco G. M. <fra...@uv...>]

Hi Jomi, all,

I am getting the following start-up Exception when activating the checkbox "Print out warnings about singleton variables in plans and rules" in Jason options.

Jason Http Server running on http://192.168.2.8:3272
[agent1] as2j: parsing error: "jar:file:/C:/Users/franc/Documents/jason-2.4/libs/jason-2.4.jar!/asl/kqmlPlans.asl"
java.lang.NullPointerException
	at jason.asSyntax.Plan.getTerm(Plan.java:88)
	at jason.asSyntax.Structure.countVars(Structure.java:431)
	at jason.asSyntax.Structure.getSingletonVars(Structure.java:419)
	at jason.asSyntax.parser.as2j.agent(as2j.java:221)
	at jason.asSemantics.Agent.parseAS(Agent.java:440)
	at jason.asSemantics.Agent.parseAS(Agent.java:408)
	at jason.asSemantics.Agent.loadKqmlPlans(Agent.java:229)
	at jason.asSemantics.Agent.load(Agent.java:192)
	at jason.asSemantics.Agent.create(Agent.java:121)
	at jason.infra.centralised.CentralisedAgArch.createArchs(CentralisedAgArch.java:72)
	at jason.infra.centralised.RunCentralisedMAS.createAgs(RunCentralisedMAS.java:485)
	at jason.infra.centralised.RunCentralisedMAS.create(RunCentralisedMAS.java:207)
	at jason.infra.centralised.RunCentralisedMAS.main(RunCentralisedMAS.java:84)
[agent1] hello world.

As you can see, a dummy "hello world" project still works but I wonder if other projects might have a problem. Anyway, this option is really useful and I hope it is easy to fix.

Many thanks for all you help and support.

Best,
Fran