Finding the latest PSP information
Keep informed on the most recent information about conditions that might impede your IBM® i software installation process.
To ensure that your system has the correct
PTFs installed for upgrading to IBM i
7.1, review Information APAR II14482 
(search for II14482 at www.ibm.com/support/).
If you are using image catalogs to upgrade, certain PTFs are required. If you using an image catalog to install a more recent update of the same release of IBM i, for example, you might need to load and apply a certain PTF. This information is part of the steps found in Preparing to upgrade or replace software using an image catalog. Some of these steps need to be performed at least a day before you install the software to ensure that your installation media are ready to use.