During uninstallation, the uninstaller uses the product registry file to determine what needs to be uninstalled:
Solaris OS: /var/sadm/install/productregistry
If the uninstaller fails, you might need to retry after you restore the product registry from your backup copy.
If you manually remove packages, the product registry is not automatically updated. When you subsequently run the uninstaller, you might encounter problems because the product registry does not correctly reflect your system. In this case, you can try to reinstall and then run the uninstaller again.