CDISI3011W

The upgrade program cannot remove all the files for the current installation.

The most likely cause is that applications or runtime instances are still using the current installation.
Review the messages in other sections of the installation log, and look for any lists of files that were not removed. If you find files with file names that start with .nfs, you can clean up these files by stopping each instance that is running on the current installation, and by ending the applications that are using the current installation.