NL_solverpath

1. If this parameter is defined, it is used to determine the solver executable that is to be used by subsequent calls to maximize/ minimize.

2. This parameter needs to be defined in addition to NL_solver when

• the solver program cannot be located using the current search path of the operating system, or
• the name of the solver program is different from the options prefix defined in NL_solver, or
• the solver is not invoked directcly but via some batch script, for example in order to add some solver-specific command line options.