[Ipopt] Setting initial feasible point

[Akshay Gupte]

Hi all,
I am using the AMPL interface for solving my NLPs using Ipopt. I would like to set a starting point for Ipopt. How do I go about it ? I tried the usual AMPL syntax :
let {i in I} x[i] := startval[i];

Although, this works with other NLP solvers, Ipopt does not seem to recognize this initial point. I read that initial feasible points are handled differently by interior point solvers to ensure that they are not too close to the boundary. Do I need to set any warm starting parameters, bound_frac etc. ? 

Any help is much appreciated.

Regards,
Akshay Gupte
PhD student, Operations Research
Georgia Institute of Technology
akshayg at gatech.edu