Multicriteria objectives are for linear and integer problems only.

If you have several criteria and at least one that is quadratic:

• you could minimize the first one, get a solution with crit1=value1, then add a constraint to force it to be optimal or good enough (crit1 to be <= value1 + epsilon), and optimize the second criterion, and so on.

• or you could use piecewise linear approximations instead of the quadratic terms.

(Of course, in your example, there is a single criterion, so no need to use a multicriteria objective, just remove "staticLex")