You must use the advanced installation procedure if any of the following is true:
To perform an advanced installation, you need to use the xlCndi Perl script provided with the installation image, to install XL C/C++ to a non-default directory and run multiple versions of XL C/C++ on a single system. The script is packaged in the xlCcmp.13.1.0.ndi fileset. To avoid unexpected behavior during installation, do not modify this script.