[Ipopt] print_level and output_file options

[Stefan Vigerske]

Hi,

instead of using the output_file option, you could use the
IpoptApplication::OpenOutputFile() method:
http://www.coin-or.org/Ipopt/doxygen/classIpopt_1_1IpoptApplication.html#a0991d6ff29463d5aa6478078a726e5df

That should enable additional writing of output to a file of the given name.

Stefan

On 10/15/2015 08:53 PM, Brad Bell wrote:
> I have a multi-level optimization problem. Each time I evaluate the
> object for the output problem, the inner problem must be solved.
> Sometimes (for very simple test cases) I wish to trace both the inner
> and output problems in separate files.  The Ipopt documentation contains
> the following text:
>
> output file:
> File name of desired output file (leave unset for no file output). NOTE:
> This option only works when read from the ipopt.opt options file! ...
>
> Is it possible to set a different output file for this inner and outer
> problem without using the options file; i.e., using the C++ interface
> for setting options ?
>
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>


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