Tuesday, March 25 2014
Keywords: Oracle client installation error [INS-3205], Oracle 11g, Orace 12c, Intall into a different Oracle home
INS-32025 The chosen installation conflicts with software already installed in the given Oracle home
I was installing Oracle Client into an old-existing VM. Prior to installing the new 18.104.22.168 drivers, I uninstalled (or de-installed as Oracle calls it) the old drivers in that machine.
The uninstall (de-install!) went successful with no errors.
Right after I attempted to install the new Oracle client drivers. But to my surprise I got prompted with an unusual error message:
[INS-32025] The chosen installation conlicts with software already installed in the given Oracle home.
I was trying to install it into our usual path we always utilize at the company in order to install Oracle client (D:\app\Oracle").
The cause of this problem is left-over Oracle files, most probably from a previous "Oracle InstaClient" installation, under "Program Files" or "Program Files(x86)" depending on your OS bit-width.
On this VM they were still many files under "C:\Program Files (x86)\Oracle" folder, even though everything regarding Oracle was supposed to have been completed uninstalled on this VM already. After all I was trying to do a clean install.
These are the steps I took to solve the problem. It took about 10 minutes to do all this, so it is worth it. The VM in question has been working flawlessly every since and is actually in-use at the time of writing, so this fix has not introduced any problems or bugs:
1) Registry clean-up
I ran regedit, and did a search for "d:\app\" (we only use this folder for Oracle client software, so before doing a clean install... there must absolutely be no reason for any existing registry keys or values pointing to this path). I deleted any key that had or was pointing to this value in any way. There were a dozen.
2) Windows Services clean-up
Even though I had just run Oracle de-install, I noticed that there was still one Windows service whose name started with Oracle. The service was still running, or so it stated. I stopped the service. After having done so, the service immediately disappeared from the list. This basically proved that the service was in fact uninstalled properly, however the VM needed a reboot before the service in question would be taken off the services list. So no alarm here.
3) Oracle home folder clean-up
I noticed there were some left over files and folders under D:\app folder, I deleted them all.
4) Program Files clean-up
By just implementing the three above steps, the problem still did not go away. I attempted yet another installation and it failed with the same error message. So I immediately knew that if the registry, windows services and client folders were already cleaned up, the problem then forcefully had to reside with the Oracle app folder. It just made sense... The elimination process.
I deleted everything under "C:\Program Files (x86)\Oracle".
That did the trick and I was able to run a successful installation afterwards. The VM has been working without an associated bug ever since.
Written by Montreal DBA Team