[Coin-ipopt] Ipopt C++ 3.0.0 print_level options

[Andreas Waechter]

Hi Wei,

You are right, there is a problem setting the print_level using the
Options() method on the IpoptApplication - this is one of the things we
will have to clean up in the new release.

The easiest solution is if you would just create a file called PARAMS.DAT
(this is one of the ways you can set options in Ipopt).  In that file
include the line

print_level 0

This should work and switch off the output, if you put that PARAMS.DAT
file into the directory where you execute your program.  On the long run
this is not nice, but we hope to fix that soon.

Regards,

Andreas

On Tue, 6 Dec 2005, Xie Wei wrote:

> Hi, Andreas:
>
> I am incorporating Ipopt in a branch-and-bound framework and wish to
> suppress any output to the screen from IPOPT, so as not to mess up with the
> iteration info from the branch-and-bound. Now, the question is that: what
> option should I use? I check the manual of C++, and it suggests me to set
> print_level to 0. However, even after doing so, the code still has a lot of
> printouts, namely, problem statistics, iterational information, and post
> solution statistics. I am wondering if IPOPT provides any convenient way, or
> I have to hack the source code.
>
> Thanks,
>
> Wei
>