Problems with isql

In windows, the environment variables, including SYBASE HOME, are located in the following files:


SYBASE.bat

SYBASE.ini


These files are located in HOME.

Now it says there
Set SYBASE = C: \ isql


Now home for isql and for bases does not match and when I try to connect to the database via isql I get the following error:

     CT-LIBRARY error:,
     ct_connect(): directory service layer: internal directory control layer error: Requested server name not found.


Help please, how to achieve connection through isql?