* soft nproc 1024
The rationale for this was to prevent fork bombs from occurring, To keep using the limits.conf for your nproc ulimit settings, you would need to comment this line out by making the first character on the line a hash/pound symbol.
#* soft nproc 1024
For the record, this was the exception that led me to this particular document: -
WARNING: Current system has detected a lower level of ulimit open files setting than the recommended value of 8192. Increase the ulimit open files value to minimum value of 8192 and re-start the installation.
Shutdown your installer. If you are a root user open a command prompt and issue ulimit -n 8192 and then restart the installer. If you are a non-root user, work with your system administrator to increase your ulimit -n 8192 and then restart the installer.