http://www.perlmonks.org?node_id=1027952


in reply to Re^8: Connecting to sqlserver2008 - DBD::Sybase connectivity and unixODBC issue
in thread Connecting to sqlserver2008 - DBD::Sybase connectivity and unixODBC issue

I think this usually happens because the driver requires some environment variable to be set before connecting e.g., DB2 likes DB2INSTANCE setting. Perhaps there is something similar with the Sybase driver.