Running different version of CA Directory on same host

Document ID : KB000095406
Last Modified Date : 10/05/2018
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Can one run different versions of CA Directory on the same box for testing? For example, having r12.0 and r12.6 on the same box. Would the installers complain?
Unfortunately the answer is no. One cannot have two different (even the same version with different Service Packs) versions of CA Directory running or co-exist on a same host/server.