inserts the specified text file in the start section of the iges file. you can use valid parametric note symbols to be replaced
during the export in this file. for example, in the text file you can use &dwg_namewhich is replaced by the actual drawing name when a drawing is exported. similarly, &model_nameis replaced with the part or assembly name when exporting from
these modes.
use the full path to avoid problems, for example, /home/users/iges_header_file.