On Linux platforms, the installer stores information on which Oracle Developer Studio 12.6 packages it has installed in two places:
The database of installed packages
The .nbi directory in the root home directory (/root/)
If some packages were not properly installed, you will have problems using the Oracle Developer Studio software, and you might have problems installing additional components or uninstalling the software.
For example, if the installer quit before installation was complete, the uninstaller (uninstall.sh) might not be present in your installation directory. Or if you used the pkgadd command to install any of the packages, the productregistry file or the product-cache directory in the /.nbi directory might be corrupted. In such cases, the uninstaller cannot uninstall the packages and you need to remove them in the Oracle Solaris product registry. See Fixing a Failed Installation or Uninstallation on Oracle Solaris 10 Platforms for instructions on how to remove the Oracle Developer Studio packages.
If the uninstaller quits before all the product files are deleted, rerunning the uninstaller will not delete the remaining files and you need to remove them in the correct way to complete the uninstallation of the product.
Do not uninstall the product by removing the installation directory. Packages will still be registered in the productregistry database and the /.nbi directory, and the installer will not run.