Beginner problem (Pyomo - Nevergrad)

[Martiene Ubbens]

Dear community,

I am attempting to solve simple example 1.2.1 from the Pyomo textbook with Nevergrad. This is the code:

I receive the following warnings:

- RuntimeWarning: invalid value encountered in true_divide reduced = value / self.sigma.value (3x)

- WARNING (W1001): Setting Var 'x_1' to a value `nan` (float) not in domain NonNegativeReals. WARNING (W1001): Setting Var 'x_2' to a value `nan` (float) not in domainNonNegativeReals. (endlessly)

Could some please help me?

Thanks a lot in advance!

Kind regards,

Martiene

[Jonathan Nowacki]

What textbook are you using?