| e04xxc | Initialisation function for option setting |
| e04xzc | Memory freeing function for use with option setting |
| g13bxc | Initialisation function for option setting |
| g13xzc | Freeing function for use with g13 option setting |
| h02xxc | Initialise option structure to null values |
| h02xzc | Free NAG allocated memory from option structures |