I have Oracle 11g installed on my system and want to install 12c now. Read articles (Oracle docs and general) which suggest that I can do so in different homes. But, when I try to install 12c (18.104.22.168 release 1), it does not allow me to do so as it says "oracle _home (in environment variables) already defined and does not match the path specified (during installation)". A search on this portal gives results that do not answer my query.
What path should I specify for software location (Oracle home) during installation? (It auto reflects the server path of 11g installed) Do I need to manually add this specified path to Oracle_Home path (in addition to the already existing oracle home for 11g) in environment variables for the installation to auto-accept it and allow further installation?
How do I get around the installation?