A gtk+ graphical interactive version of nec2c
xnec2c \,<input-file-name>\/
[-i <input-file-name>] [-j <number of processors in SMP machine>] [-h: print this usage information and exit] [-v: print xnec2c version number and exit]
The full documentation for xnec2c is maintained as a Texinfo manual. If the info and xnec2c programs are properly installed at your site, the command
info xnec2c
should give you access to the complete manual.