Policy Error

[hintaw]

hello
when I am trying to run the code I got the following error:

Exception in thread "main" java.lang.IllegalArgumentException: No valid resource found!
at it.unisa.dia.gas.plaf.jpbc.pairing.parameters.PropertiesParameters.load(PropertiesParameters.java:190)
at it.unisa.dia.gas.plaf.jpbc.pairing.PairingFactory.loadParameters(PairingFactory.java:125)
at it.unisa.dia.gas.plaf.jpbc.pairing.PairingFactory.initPairing(PairingFactory.java:79)
at it.unisa.dia.gas.plaf.jpbc.pairing.PairingFactory.getPairing(PairingFactory.java:35)
at nl.sudohenk.kpabe.gpswabe.SerializeUtils.unserializegpswabePub(SerializeUtils.java:101)
at nl.sudohenk.kpabe.KeyPolicyAttributeBasedEncryption.keygen(KeyPolicyAttributeBasedEncryption.java:47)
at nl.sudohenk.kpabe.Example.main(Example.java:54)

and when I track the code it's telling me "policy" in the "kpabe.keygen(pubfile, mskfile, prvfile, policy); "statement not getting anything
So, could you please tell me what have I to do