This error appears when trying to do a network install of Centos minimal.iso.

The system looks in the file .treeinfo to find the path to the install files.

In the Centos 6.5 minimal package this information is missing.

Edit your .treeinfo file

Find: [images-x86_64]

Add this below it:

kernel = images/pxeboot/vmlinuz

Save.

Done.