If you have a working Adaptive Server on your system, do not install the Cluster Edition in the same $SYBASE directory.
Sybase recommends that you install the Cluster Edition in its own directory. If you are performing a private installation Sybase recommends that you install Adaptive Server on each node in the cluster in its own directory. This directory must not contain Adaptive Server version 15.0.x. If you must install other products into the same directory, install the Cluster Edition last.
Installing other products on top of the Cluster Edition will likely result in one or more of the products not working correctly.