Unable to reinstall Project Professional

[Mike Rudman]

Following a hung installation of Office 2003 SP1, Project Professional
stopped working. Tried to uninstall Project Professional, but when I tried
to reinstall received the message:



PROJ_PRO_ON_PRO_ERROR.

Project Professional 2003 cannot be installed when another instance of
Project Professional 2003 is already present. To install this copy of
Project Professional 2003, first remove the previous instance of Project
Professional 2003 using Add/Remove Programs from the Control Panel.



As I had already run uninstall from the control panel I tried using the
"Windows Install Clean-up Utility", but on trying to reinstall the error
repeats.



I've attempted looking in the registry for the SKU 3B in GUID's and removing
these registry entries to no avail.



Any advice welcome?

 

[Rod Gill]

Does a repair work?

--
For VBA posts, please use the public.project.developer group.
For any version of Project use public.project
For any version of Project Server use public. project.server

Rod Gill
Project MVP
For Microsoft Project companion projects, best practices and Project VBA
development services
visit www.projectlearning.com/

 

[Mike]

Rod,

Sadly, I don't get as far as the repair option. The
preparing for install window appears followed by another
window stating "Project Professional 2003 cannot be
installed when another instance of Project Professional
2003 is already present." even though it isn't.

Obviously there is an entry in the registry set to
indicate that Project is already loaded, but I haven't
got a clue what it is?

Your help is appreciated.

Regards, Mike