Dear All,



I couple of weeks ago, I’ve asked for a package recommendation for nonlinear
optimization. In my problem I have a fairly complicated non-linear objective
function subject to one non-linear equality constrain.



I’ve been suggested to use the *Rdonlp2* package, but I did not get any
results after running the program for 5 hrs. Is it normal to run this type
of programs for hours? Also, I’d like to ask the experts whether there is
any other alternative I could use to solve this. For example, can I define a
Lagrange function (add lambda as a parameter) and use optim() or any other
optimization function?



Many thanks in advance for your help.



Lars.

	[[alternative HTML version deleted]]


