[Ipopt] Extract Objective Function Gradient in finalize_solution(...)

[Knut Heidemann]

Hi,

I am trying to access the objective function gradient information after 
my problem has been solved.
I assume that this is done in finalize_solution(...).
Unfortunately, I do not manage to use "ip_cq" for this purpose. Can 
anybody tell me how the appropriate line of code would look like?

Best regards,
Knut Heidemann.