Hello Ian,
It seems to be an issue with the directory from where you are running the installer script.
Can you please provide the listing of your directory from where you are executing the script.
The directory should be similar to below output.
[root@nagios-centos cisco-ucs-nagios-0.9.3]# ls -lrt
total 92
-rwxr-xr-x 1 root root 32379 Jan 29 15:01 installer.py
-rw-r--r-- 1 root root 3456 Jan 29 15:01 INSTALL
-rw-r--r-- 1 root root 49473 Jan 29 15:01 cisco-ucs-nagios-0.9.3.tar.gz
We need to execute the "installer.py" from this directory only not from outside. And the naming convention of the tar.gz present in the directory should not be changed.
thanks