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! An output file with this
name will be written (leave unset for no file
output). The verbosity level is by default set
to "print_level", but can be overridden with
"file_print_level". The file name is changed
to use only small letters.
The default value for this string option is "".
- *: Any acceptable standard file name