I am new to Oracle. Firstly, I have installed Oracle client 12C 64 bit and after that I am trying to install Oracle client 12C 32 Bit. I am keeping them in entirely separate directories. I tried it by running different user and by same user as well, but it abruptly stops just before installation. As soon as I click on Install , it disappears. Please help.
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Maybe your java installation is corrupt. Are you able to launch Java JDK installer 32Bit and 64 Bit? – Wernfried Domscheit Aug 16 '17 at 14:16
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Maybe try to delete files in c:\Program Files (x86)\Oracle\Inventory\
, resp. c:\Program Files\Oracle\Inventory\
. Remove also Oracle directories from PATH
environment variable.
After that the 64Bit client should be invisible for the 32Bit installer. Of course, after installation of both you should set PATH
properly, see BadImageFormatException. This will occur when running in 64 bit mode with the 32 bit Oracle client components installed for details.
Check also How to uninstall / completely remove Oracle 11g (client)? in order to make a full and clean uninstall.

Wernfried Domscheit
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