Line in VariableEliminationCore throws NullPointerException

[Manuel Luque]

The code line:

utility = new TablePotential(null);

in method "getUtility()" of class VariableEliminationCore invokes the constructor "TablePotential(TablePotential potential)", which invokes the constructor "Potential (Potential potential)", which always throws NullPointerException in the code line:

this(potential.getVariables(), potential.getPotentialRole());

[Manuel Luque]

I have fixed this issue by replacing above line with the next code:

utility = new TablePotential(null,PotentialRole.UNSPECIFIED);