Verifying the integrity of user-modified system objects

When you replace your software with the new release, the system keeps changes you made to some IBM-supplied objects.

• Verifying user profiles and checking cross-reference files
  The installation process requires that the QSECOFR and QLPINSTALL user profiles exist in the system distribution directory. The process also requires that all database cross-reference files are not in error before the installation process begins.
• Checking the QSECOFR user profile
  The QSECOFR user profile cannot have a secondary language library (QSYS29xx) at a previous release in its library list when you install a new release.
• Ensuring that the IBM-supplied product libraries are in the system ASP
  If you have moved IBM-supplied product libraries to user auxiliary storage pools (user ASPs), the installation procedures will not update the libraries.