Follow these guidelines if you are installing Open Server on the same server with other Sybase products:
Use .bat files to ensure that each product is started with the correct Open Server version and environment variables.
Sybase recommends that you do not mix versions of SDK and Open Server in the same directory. For example, do not install SDK 15.7 in a directory containing Open Server 15.5—in this case, upgrade both SDK and Open Server to 15.7.