How do I do a clean uninstall / install of OWB?

Document ID : KB000032378
Last Modified Date : 14/02/2018
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How do I do a clean uninstall / install of Open Workbench (OWB)? Sometimes, due to permission restrictions or other issues on the machine, some of the OWB components do not get uninstalled on their own. If that is the case, a manual uninstall is needed to remove the remaining components. Doing a clean uninstall / install is especially recommended if running into issues during an upgrade of OWB. 



Below are the steps to do a clean uninstall:

1. Uninstall the following components from Control Panel:

  • Open Workbench (OWB)
  • CA PPM Microsoft Project Interface 
  • CA PPM Schedule Connect
  • CAClarityAddin

2. Clean out the Registry

  • On the workstation, go to Start and type 'regedit' in the search field. Select regedit.exe.
  • Select File -> Export and enter a File Name to store the back-up of the registry just in case
  • Once finished creating a backup, delete the following keys if exist: 
    • HKEY_CLASSES_ROOT\Applications\Schedlink.exe
    • HKEY_CURRENT_USER\Software\Niku
    • HKEY_LOCAL_MACHINE\Software\Wow6432Node\Niku
    • HKEY_LOCAL_MACHINE\Software\Niku

Please note that some of the keys may not exist; also, deleting each key will correctly delete all of their sub keys. 

3. Reboot the system. 

4. Go to Add/Remove Programs again and check that there is no trace left of the products that you have removed at step 1. 

5. Delete the following folders if they are listed (First make a backup of any views you may have saved in the folders if they are still there): 

  • C:\CA\PPM\CA PPM Schedule Connect
  • C:\Program Files\CA\PPM Setups
  • C:\Program Files\Open Workbench
  • Please note that on workstations running a 32-bit version of Windows, the folder names will be prefixed with C:\Program Files (x86)\ instead of C:\Program Files\. 

6. Reinstall OWB. Ensure the version being installed is the same version and patch level as that of Clarity. It can be found in PPM by going to Home->Account Settings->Software Downloads.

Additional Information:

  • If you are unable to uninstall Open Workbench or any of it's related components from the Control Panel see the following KB: TEC1756392
  • For steps on how to do a clean uninstall of the MSP Interface see: TEC1228411