Showing optimal strategy for the dating problem throws exception

[Iñigo Bermejo]

Repro steps: - Open dating network (attached) - Hit the "Show optimal strategy" button

Nothing happens (strategy is not shown) and there's the stack trace of this exception in the Message Window:

org.openmarkov.inference.variableEliminationDAN.VariableEliminationDAN.combineRestrictionsRevelationConditionsAndPotential(VariableEliminationDAN.java:526) at org.openmarkov.inference.variableEliminationDAN.VariableEliminationDAN.symmetrizeNetwork(VariableEliminationDAN.java:147) at org.openmarkov.inference.variableEliminationDAN.VariableEliminationDAN.<init>(VariableEliminationDAN.java:108) at org.openmarkov.inference.variableEliminationDAN.VariableEliminationDAN.<init>(VariableEliminationDAN.java:93)