During the installation process, the Studio Installer generates two files that can be used to reset environment variables. The files are located in:
%SYBASE%\SYBASE.bat
%SYBASE%\%SYBASE_ASE%\ASE-12_0.bat
If you install multiple versions of Adaptive Server, or if you intend to access different Adaptive Servers on your network, you may want to change the environment variables PATH, DSLISTEN, DSQUERY, SYBASE_ASE, SYBASE_OCS, and SYBASE.