Use 0 objective functions

[emenod1]

I am trying to use some algorithms with only constraints and 0 objective functions, but only NSGA2 seems to work in this context, am i doing something wrong ?

[blankjul]

We have no tests for no objectives. What about reformulating the problem to one with only one objective (the constraint violation) and no constraints? That should work but keep in mind this problem has potentially many optima.